Machining Helical iav

Helical iav yog cylindrical iav nrog cov hniav khoov rau hauv cov duab helix; cov hniav no nyob ntawm lub kaum sab xis rau lub iav axis hu ua lub kaum sab xis helix. Ib lub iav helical muaj tib qhov sib txawv ntawm cov hniav geometry raws li cov iav spur hauv seem saib, txawm tias raug txiav. Nrog kev tsim kom zoo, qhov loj dua tag nrho kev sib cuag hauv cov iav helical tuaj yeem txo kev co thiab suab nrov.

Xa kev nug

Kev piav txog

Kev tsis muaj

Vim Li Cas Xaiv Peb

Siab Zoo

Peb tsuas yog koom nrog steel, stainless hlau, tooj liab, txhuas thiab zinc alloy khoom casting, forging, stamping thiab machining.

Cov ntawv thov suav nrog

Petrochemical, engineering, marine kev lag luam castings: xws li impellers, twj, li qub, av to, flanges.

Khoom siv Advanced

Peb cov cuab yeej ua haujlwm suav nrog ntau dua ib lub tshuab dhos zoo tib yam, NUMERICAL tswj, plaub-axis machining chaw, milling tshuab, tho txawv tshuab, grinder thiab lwm yam.

Kev Tswj Xyuas Zoo

Kuv cog rau xyoo 2005 txog ISO9001: 2008 daim ntawv pov thawj kev ua haujlwm zoo, 2016 los ntawm BV ntawv pov thawj, cov khoom tiav dhau los tau tswj hwm ntau dua 99%.

Yam khoom

Cav Steel Machined Parts

Thaum nws los txog rau cav, steel machined qhov chaw yog arguably ib co ntawm cov tseem ceeb Cheebtsam. Cov khoom no yog lub luag haujlwm rau kev ua haujlwm tseem ceeb hauv lub cav, xws li tswj cov roj thiab cua nkag, tswj kev sib txuas, thiab thaum kawg, lub zog ntawm lub tsheb. Yog li ntawd, qhov zoo ntawm machined qhov chaw tsis tuaj yeem overstated.

Bevel iav Vertical Machine Parts

Bevel iav yog ib hom iav siv rau kev xa hluav taws xob thiab kev txav ntawm ob qho kev sib tshuam shafts. Lawv feem ntau siv nyob rau hauv ntau yam kev siv, tshwj xeeb tshaj yog nyob rau hauv high-ceev thiab hnyav-duty machinery. Lub iav bevel yog tsim los nrog nws cov hniav taw qhia ntawm lub kaum sab xis mus rau lub axis ntawm lub ncej, ua rau nws tsim nyog rau kev xa tawm lub zog thiab kev txav ntawm cov shafts tsis sib xws.

Precision Spur iav

Spur iav yog ib qho ntawm feem ntau siv hom iav nyob rau hauv lub ntiaj teb no ntawm mechanical engineering. Kuj hu ua ncaj-txiav zog, spur gears xa lub zog thiab cov lus tsa suab ntawm cov shafts thaum uas tig mus, converting rotary motion rau hauv linear motion thiab vice versa. Lawv feem ntau pom muaj nyob rau hauv kev lag luam tshuab, tsheb, thiab lwm yam khoom siv hluav taws xob sib kis.

OEM Pp Yas Machining Qhov Chaw

Nyob rau hauv lub ntiaj teb no ntawm manufacturing, precision engineering thiab saib xyuas kom meej yog ib qho tseem ceeb rau kev vam meej. Qhov no yog qhov tseeb tshwj xeeb tshaj yog thaum nws los txog rau machining qhov chaw los ntawm cov yas, uas xav tau tus txheej txheem siab ntawm qhov tseeb kom ntseeg tau tias cov khoom siv tau zoo thiab ruaj khov.

Machining Ntawm Internal Gears

Internal iav yog ib qho tseem ceeb ntawm cov tshuab niaj hnub. Lawv muaj kev siv dav hauv kev lag luam xws li automotive, aerospace, thiab kev tsim khoom. Hauv qhov blog no, peb yuav ua tib zoo saib seb lub zog sab hauv yog dab tsi, lawv kev tsim kho, kev ua haujlwm, thiab kev siv.

Gear Rack Drive

Koj puas paub cov iav racks? Ib lub iav khib, tseem hu ua toothed rack, yog ib hom kab-zoo li iav nrog cov hniav uas mesh nrog cov hniav ntawm lub iav kom xa lub zog thiab kev txav. Iav racks feem ntau yog siv nyob rau hauv linear motion systems, xws li hauv CNC tshuab thiab automation khoom.

Siab Quench Hypoid Iav

Curved iav yog ib hom iav uas muaj cov duab tshwj xeeb uas tso cai rau kev ua haujlwm zoo dua thiab ua kom yooj yim rau qee yam kev siv. Tsis zoo li cov tsoos spur iav uas muaj cov hniav ncaj, nkhaus iav muaj cov hniav uas yog nkhaus ntawm lawv qhov ntev los yog hla lawv lub ntsej muag. Qhov curvature no tso cai rau cov hniav kom mesh smoothly nrog lwm cov iav thiab txo qhov hnav thiab tsim kua muag ntawm cov hniav iav thaum lub sij hawm.

Stainless hlau Turbo kab

Kab thiab cab iav kis tau tus mob yog dav siv nyob rau hauv ntau yam mechanical systems, xws li lub kauj, hoisting khoom, conveyors, thiab tshuab cuab yeej. Lawv muab txoj hauv kev yooj yim thiab muaj txiaj ntsig zoo rau kev xa cov lus tsa suab thiab lub zog ntawm ob lub kaum sab xis. peb yuav delve rau hauv kev ua haujlwm ntawm worm gears thiab tshawb nrhiav lawv qhov zoo thiab kev txwv.

Tsis yog Standard OEM Machining Parts

OEM tsim yog ib qho ntawm cov kev lag luam tseem ceeb tshaj plaws hauv ntiaj teb. Los ntawm tsheb mus rau aerospace, hluav taws xob gadgets mus rau cov khoom siv kho mob, OEM raug suav nrog ntau yam khoom. Txawm li cas los xij, qhov zoo ntawm cov khoom no feem ntau nyob ntawm qhov zoo ntawm cov khoom siv hauv kev tsim khoom.

Txhais ntawm Machining Helical Iav?

Cheebtsam ntawm Machining Helical iav

Ib txwm voj voog suab
Qhov kev ncua deb ntawm cov ntaub ntawv zoo sib xws ntawm cov hniav nyob sib ze raws lub voj voog lub voj voog lossis kab suab yog hu ua lub suab suab (p).

Vajvoog Thickness
Circular thickness (t) yog hais txog qhov ntev arc uas sib cais cov hniav iav ob sab ntawm lub suab lub voj voog.

Helical Angle
Lub kaum sab xis helical yog tsim los ntawm cov hniav zoo nkauj thiab lub dav hlau transverse (plane ntawm kev sib hloov) ntawm lub suab vojvoog.

Pitch Diameter
Lub pitch txoj kab uas hla yog lub suab ib txwm rau tus hniav los yog ntawm lub kaum sab xis rau nws.

Helix's Direction
Kuj hu ua Lead, lo lus no hais txog axial ua ntej ntawm cov hniav thoob plaws ib qho kev sib hloov (xws li hauv xov suab).

Pitch Vajvoog
Lub suab lub voj voog yog lub voj voog siv los sawv cev rau cov iav hniav loj. Nws qhov kev ncua deb yog sib npaug rau tus naj npawb ntawm cov hniav lub sij hawm lub voj voog. Contrary to the tip and root circles, lub suab lub voj voog yog ib lub voj voog xav txog uas tsis tuaj yeem pom.

Circle Pitch Size
Qhov no yog txoj kab uas hla ntawm lub suab voj voog (tseem hu ua lub suab lub voj voog txoj kab uas hla). Lub iav yog lub log sib txhuam nrog cov hniav, thiab lub suab lub voj voog, uas yog lub voj voog siv rau kev txheeb xyuas lub suab ntawm cov iav hniav, sib raug rau lub log sib txhuam sab nraud.

Transverse Pressure Angle
Qhov projection ntawm lub load mus rau lub dav hlau hais txog lub ncej axis ua lub kaum sab xis hu ua lub transverse siab kaum sab xis.

Center nrug
Qhov no yog qhov txuas ntxiv lossis cog lus tus qauv chaw nyob deb, qhov xav tau kev khiav haujlwm chaw nyob deb.

Ntxiv (A)
Lub iav qhov ntxiv (A) yog qhov ntsuas nruab nrab ntawm lub suab lub voj voog thiab nws lub vojvoog hniav. Cov hniav qhov siab (h) yog qhov ntsuas nruab nrab ntawm lub iav lub hauv paus lub voj voog thiab lub taub hau, thiab lub iav module (m) txiav txim siab tag nrho qhov siab ntawm lub iav.

Sab nraud txoj kab uas hla
Lub voj voog lub voj voog tsim los ntawm kev koom nrog cov lus qhia hniav yog lub npe hu ua sab nraud txoj kab uas hla (tseem hu ua lub taub taub).

Deendum
Lub denendum ntawm lub iav yog txhais raws li qhov ntev ntawm lub suab vojvoog mus rau lub hauv paus vojvoog ntawm lub midpoint ntawm ib tug iav hniav.

Tag Nrho Cov Hniav Qhov tob
Lub addendum thiab denendum yog ntxiv ua ke los tsim tag nrho qhov tob, uas yog qhov siab ntawm cov hniav ntsuas los ntawm lub hauv paus voj voog mus rau lub voj voog taub.

Hauv paus kab
Txoj kab uas hla ntawm lub voj voog nyob ib puag ncig hauv qab (hauv paus) ntawm cov iav hniav khoob yog lub npe hu ua lub hauv paus txoj kab uas hla (RD).

Sib cuag piv
Daim duab no yog ntau tshaj qhov ua tau nrog cov spur iav ncaj nraim vim nws sawv cev tag nrho ntawm cov hniav sib tshooj thiab cov helical sib tshooj.

Qhov zoo ntawm Machining Helical iav

Tsawg suab nrov thiab kev co

Helical iav yog tsim los mesh maj es tsis yog kiag li. Tsis tas li ntawd, helical iav tuav nruj dua kev sib cuag thiab tsim kom nruj dua. Ob qho tib si no txo cov suab nrov thiab kev co.

Lub zog thiab tso zis

Rau siab zog thiab load daim ntaub ntawv, helical gears muaj zog dua lwm yam spur iav. Helical iav yog siv nyob rau hauv ntau yam kev siv, nrog rau cov chiv, luam ntawv, thiab lub ntiaj teb txav machinery.

Ntau yam Tsim

Txawm hais tias cov iav helical feem ntau yog siv los xa hluav taws xob hla cov ncej sib npaug, cov iav helical zoo tuaj yeem siv los xa lub zog hla cov ncej ntsug ib zaug.

Kev ua haujlwm du

Cov iav teeb ua haujlwm zoo dua vim tias cov iav helical maj mam meshing nrog tsawg kawg nkaus load load.

Machining Helical Iav siv li cas?

Machining Helical Iav yog ib hom cylindrical iav siv nyob rau hauv kev lag luam daim ntaub ntawv los xa lub zog thiab torque ntawm ob rotating ncej. Lawv muaj cov hniav helical, txhais tau tias lawv raug txiav ntawm lub kaum sab xis rau lub ntsej muag ntawm lub iav. Qhov kev tsim no tso cai rau kev sib cuag ntau dua ntawm cov hniav ntawm ob lub zog thaum meshing ua ke, ua rau kev ua haujlwm zoo dua thiab ntsiag to. Helical iav feem ntau yog siv rau hauv kev siv hluav taws xob kis tau tus mob vim lawv muab lub peev xwm thauj khoom siab thiab ua haujlwm ntev.

Machining Helical iav tuaj yeem yog ib leeg lossis ob chav helical. Ib leeg helical iav muaj cov hniav txiav nyob rau hauv ib qho kev taw qhia nkaus xwb, thaum ob chav helical iav muaj cov hniav txiav nyob rau hauv ob qho kev taw qhia kom ua tiav txawm smoother lag luam. Kev tsim cov iav helical kuj pab txo qis kev co thiab suab nrov, ua rau lawv zoo tagnrho rau ntau daim ntawv thov uas yuav tsum tau ua haujlwm du thiab ntsiag to.

Machining Helical Iav tuaj yeem tsim los ntawm ntau yam khoom xws li hlau, tooj dag, txhuas, tooj liab, thiab yas. Helical iav manufacturers muaj ntau hom iav rau kev siv tshwj xeeb, suav nrog cov iav iav, iav iav, iav iav, iav iav, thiab lwm yam. Cov neeg tsim khoom kuj tseem muab cov khoom siv helical ua rau kev siv tshwj xeeb.

Qhov kev xaiv ntawm Machining Helical Gear cov khoom siv thiab tsim yuav nyob ntawm daim ntawv thov nws tau siv rau. Kev siv ntau tshaj plaws rau Machining Helical Iav yog nyob rau hauv kev kub ceev fais fab kev siv, xws li tsheb cav, tshuab cuab yeej, twj, thiab compressors. Helical iav kuj tseem siv rau hauv kev siv tshuab robotics thiab aerospace, nrog rau lwm yam kev lag luam uas xav tau kev sib kis ntawm lub zog thiab lub zog.

Qee yam tseem ceeb thiab cov yam ntxwv ntawm Machining Helical Iav

Helical hniav:Qhov txawv feature ntawm helical iav yog lawv cov hniav helical los yog kauv-zoo li tus hniav. Cov hniav no muab kev sib koom ua ke du thiab maj mam, uas ua rau muaj kev ua haujlwm ntsiag to thiab smoother piv rau cov spur iav (cov iav nrog cov hniav ncaj).

Kev ua tau zoo:Helical gears paub txog lawv cov tshuab ua haujlwm siab vim yog kev sib txuas ntawm cov hniav. Qhov no txo qhov hnav thiab txo qis zog poob hauv kev sib kis.

Load Distribution:Cov qauv tsim helical tso cai rau ntau cov hniav sib txuas rau tib lub sijhawm, uas pab faib cov khoom sib npaug thoob plaws cov hniav iav. Qhov kev faib khoom thauj no ua rau lub iav muaj peev xwm los tuav cov khoom hnyav.

Kev ua haujlwm du:Vim hais tias ntawm cov hniav helical geometry, helical iav tsim tsis tshua muaj kev vibration thiab suab nrov thaum lub sijhawm ua haujlwm, ua rau lawv tsim nyog rau cov ntawv thov uas ua haujlwm ntsiag to tseem ceeb.

High Precision:Helical iav paub txog lawv qhov tseeb thiab qhov tseeb, ua rau lawv tsim nyog rau cov ntawv thov uas xav tau kev tswj xyuas qhov tseeb thiab qhov chaw.

Versatility:Lawv tuaj nyob rau hauv ntau yam configurations, nrog rau thaum uas tig mus ncej thiab hla axis (worm thiab helical) setups, ua rau lawv adaptable rau txawv daim ntaub ntawv thiab tsim yuav tsum tau.

Daim ntawv thov:Helical iav yog siv nyob rau hauv ntau yam kev lag luam thiab kev siv, nrog rau kev xa tsheb, kev siv tshuab, neeg hlau, tshuab conveyor, thiab lwm yam.

Helix Angle:Lub kaum sab xis ntawm cov hniav raug txiav yog hu ua lub kaum sab xis helix. Lub kaum sab xis helix txiav txim siab qhov kev taw qhia ntawm kev sib hloov thiab lub zog thrust tau ntsib los ntawm lub iav. Txoj cai-tes helical iav muaj lub kaum ntse ntse helix, thaum sab laug-tes helical iav muaj lub kaum sab xis.

Kev tu:Kev saib xyuas tsis tu ncua, xws li lubrication thiab kev tshuaj xyuas ib ntus rau kev hnav, yog qhov tseem ceeb los xyuas kom meej qhov kev ua tau zoo thiab kev ua haujlwm ntev ntawm helical iav.

Cov ntawv pov thawj

Peb lub Hoobkas

Peb cov cuab yeej ua haujlwm suav nrog ntau dua ib lub tshuab dhos zoo tib yam, NUMERICAL tswj, plaub-axis machining chaw, milling tshuab, tho txawv tshuab, grinder thiab lwm yam. Cov khoom hnyav li ntawm 3 g mus rau 3 tons. Kuv cog rau xyoo 2005 txog ISO9001: 2008 daim ntawv pov thawj kev ua haujlwm zoo, 2016 los ntawm BV ntawv pov thawj, cov khoom tiav dhau los tau tswj hwm ntau dua 99%.

FAQ

Q: Dab tsi yog qhov kev txwv tseem ceeb ntawm lub iav helical?

A: Helical iav yog superior rau spur iav nyob rau hauv lawv cov load-nqa muaj peev xwm thiab ntsiag to thiab smoothness ntawm lub lag luam, uas tshwm sim los ntawm zawv zawg sib cuag ntawm cov hniav meshing. Ib qho tsis zoo, txawm li cas los xij, yog kev sib txhuam ntau dua thiab hnav uas nrog rau qhov kev ua zawv zawg no.

Q: Txoj cai txoj cai ntawm helical iav yog dab tsi?

A: Rau helical iav, siv helix yog txhais los ntawm lub kaum sab xis helix, , ntawm txoj kab uas hla theoretical pitch. Lub cim ntawm lub kaum sab xis txiav txim siab txhais tes ntawm lub helix, nrog qhov zoo (+) yog sab xis.

Q: Cov iav helical puas tuaj yeem ua rau ntawm lub tshuab milling?

A: Txawm li cas los xij nws tsuas yog yooj yim los ua helical iav ntawm lub tshuab ntsug milling. Lub ntsiab thiab tej zaum tsuas yog drawback yog tias qhov teeb tsa rau helical milling ntawm lub tshuab ntsug tsis yog nruj li nws yuav nyob rau ntawm lub tshuab kab rov tav.

Q: Lub kaum sab xis zoo tshaj plaws rau helical iav yog dab tsi?

A: Ib leeg-helical ces kaum poob ntawm 5 degree thiab 20 degree, thiab ob-helical ces kaum poob ntawm 20 degree thiab 45 degree. Helix cov ces kaum raug xaiv kom tau txais qhov sib tshooj tsawg kawg nkaus thiab muab kev sib koom ua haujlwm zoo. Daim duab 14-7 qhia txog qhov cuam tshuam ntawm qhov sib tshooj sib tshooj nrog lub kaum sab xis helix.

Q: Puas yog helical iav muaj zog dua li kev txiav ncaj?

A: Helical iav tuaj yeem hloov lub zog ntau dua li cov iav ncaj tuaj yeem. Tab sis lub helical gearing generates axial thrust. Lub zog axial no yuav tsum tau nqus, lossis ob lub iav helical yuav tsum tau ua ke (herringbone gearing lossis ob chav helical gearing) los tsim ib lub iav. Cov axial rog ua kom cov kabmob hnav.

Q: Cov iav helical puas tuaj yeem txiav rau hauv qab no hom milling tshuab?

A: Lub tshuab ua kab rov tav nkaus xwb tuaj yeem txiav cov iav helical yog tias nws muaj lub rooj uas tig. Tab sis, xav tsis thoob, nws muaj peev xwm txiav helical iav ntawm lub tshuab ntsug milling.

Q: Lub suab ib txwm ntawm lub iav helical yog dab tsi?

A: Ib txwm suab: Lub suab ib txwm ntawm lub iav helical yog lub suab ntawm cov cuab yeej siv los txiav cov hniav. Nws yog ntsuas nyob rau hauv ib lub dav hlau perpendicular mus rau cov kev taw qhia ntawm cov hniav.

Q: Lub ntsej muag siab tshaj plaws ntawm lub iav helical yog dab tsi?

A: Qhov siab tshaj plaws ntawm lub ntsej muag yuav raug coj los ua 12.5 m txog 20 m, qhov twg m yog qhov module. Nyob rau hauv cov nqe lus ntawm pinion txoj kab uas hla (DP), lub ntsej muag dav yuav tsum yog 1.5 DP rau 2 DP, txawm tias 2.5 DP yuav siv tau. Qhov siab tshaj plaws ntawm lub ntsej muag yog li ntawm 20 m txog 30 m.

Q: Dab tsi yog qhov siab tshaj plaws ntawm helical iav?

A: Spur iav feem ntau tsis khiav ntawm qhov ceev ntawm ntau tshaj 10m / s. Helical iav tuaj yeem khiav ntawm qhov ceev tshaj 50m / s thaum raug machined thiab sib npaug. Lub tsheb ciav hlau helical nrog cov axes sib npaug yog zoo ib yam li cov iav spur nrog tib tus hniav profile thiab proportions.

Q: Puas helical iav kav ntev dua?

A: Helical iav yog qhov ruaj khov dua. Lawv muaj cov hniav ntau dua uas txhais tau hais tias tsawg dua load muab tso rau ntawm txhua tus hniav uas ua rau hnav tsawg dua. Helical iav muaj peev xwm nqa tau siab. Nws cov hniav, uas yog diagonally positioned, yog loj dua nyob rau hauv tus naj npawb thiab ntev, ua rau thaj tsam ntawm kev sib cuag.

Q: Muaj pes tsawg hom helical iav muaj?

A: Muaj ntau hom helical gearboxes - ib qho helical iav, ob chav helical iav thiab herringbone iav.

Q: Cov kev taw qhia dab tsi ua helical iav thrust?

A: Vim yog lub helix ntawm cov hniav iav, helical iav hauv mesh tsim thrust rog nyob rau hauv cov lus qhia axial. Lub axial thrust bearings yuav tsum muaj peev xwm tiv taus cov zog no. Cov kev taw qhia ntawm cov thrust rog nyob ntawm tes helix thiab cov kev taw qhia ntawm kev sib hloov raws li qhia hauv qab no.

Q: Koj ntsuas lub helical iav backlash li cas?

A: Cov txheej txheem ntawm kev ntsuas backlash suav nrog txoj kev siv lead ua hlau thiab kev ntsuas qhov sib txawv, 13 Lub backlash tuaj yeem tau los ntawm kev ntsuas lub thickness ntawm lub thinnest ib feem tom qab lub iav extrudes cov hlau lead hlau los yog los ntawm kev ntsuas cov ntaub ntawv nrog ib tug feeler gauge.

Q: Lub kaum sab xis yog helix iav?

A: Lub kaum sab xis ntawm lub iav yog lub kaum sab xis tsim los ntawm txoj kab helical ntawm cov hniav kab thiab cov generatrix ntawm lub tog raj kheej ntawm lub tog raj kheej xws li lub tog raj kheej pitch. Nyob rau hauv cov ntaub ntawv ntawm kauv bevel iav, nws yog lub kaum sab xis tsim los ntawm cov hniav kab thiab cov generatrix ntawm lub suab cone.

Q: Lub suab ib txwm nyob hauv helical iav yog dab tsi?

Q: Lub kaum sab xis ntawm lub helical iav yog dab tsi?

A: Daim ntawv thov ntawm lub kaum sab xis helix feem ntau siv qhov loj ntawm 15 degree mus rau 30 degree rau helical iav, nrog rau 45 degree capping qhov kev txwv kev nyab xeeb. Lub kaum sab xis nws tus kheej yuav raug txiav nrog sab xis-tes lossis sab laug-tes taw qhia.

Q: Dab tsi yog qhov chaw nruab nrab ntawm lub iav helical?

A: Txawm li cas los xij, yog tias qhov profile hloov pauv coefficients yog xoom, ces qhov chaw nruab nrab ntawm ib khub ntawm cov iav helical yog sib npaug rau ib nrab ntawm cov lej ntawm txhua lub iav siv txoj kab uas hla. Qhov siv txoj kab uas hla ntawm lub iav helical kuj hu ua lub suab kab.

Q: Koj ntsuas lub helical iav backlash li cas?

Q: Puas helical iav xav tau lubrication?

A: Kev lubrication thiab txias kom zoo yog qhov tseem ceeb rau kev ua haujlwm txhim khu kev qha ntawm high-speed helical iav. Raws li lub suab kab nrawm thiab iav hniav thauj khoom tau nce, yog li muaj lub lubrication thiab txias yuav tsum tau ua.

Q: Dab tsi yog qhov zoo ntawm helical txiav iav?

A: Qhov zoo ntawm Helical Gears
Vim tias cov hniav sib xyaw ua ke maj mam, cov iav helical muab cov iav ua haujlwm zoo dua, txo cov kev poob siab thiab ua rau muaj suab nrov thiab kev co. Qhov no ua rau lawv zoo tagnrho rau kev siv high-speed qhov twg suab nrov abatement yog qhov yuav tsum tau muaj. Helical iav yog ruaj khov dua.

Cim npe nrov: Tuam Tshoj machining helical iav manufacturers, lwm tus neeg, Hoobkas

Tug

Iav Log Kev Muag Khoom

Tom ntej

Machining Helical iav

Xa kev nug

Koj Tseem Yuav Zoo Li