Doosan Excavator 200104-00017A Dx55 Dx60 Taug qab hauv qab cov menyuam txhawb nqa cov menyuam sib dhos tsim los ntawm cqctrack ntawm quanzhou

Doosan Excavator 200104-00017A DX55 DX60 Taug qab hauv qab Roller /Kev Txhawb Nqa Cov MenyuamSib dhos

Pawg Khoom: Excavator Undercarriage Cheebtsam / Tracked Chassis Parts
Cov Qauv Siv Tau: Doosan DX55, Doosan DX60 Mini Excavators
Tus lej siv rau OEM:200104-00017A
Cheebtsam Hom: Khiav Hauv Qab Cov Menyuam / KhiavKev Txhawb Nqa Cov MenyuamSib dhos
Daim Ntawv Pov Thawj: CQC (Tuam Tshoj Daim Ntawv Pov Thawj Zoo), ISO 9001: 2015
Chaw Tsim Khoom: CQCTRACK (HELI MACHINERY MANUFACTURING CO., LTD.), Quanzhou, Suav Teb

1. Txheej txheem cej luam khoom: Kev tsim kho vaj tse hauv qab rau Doosan Compact Excavators

Lub Doosan Excavator 200104-00017A Track Bottom Roller Assembly yog ib qho khoom siv hauv qab uas tau tsim tshwj xeeb rau Doosan DX55 thiab DX60 mini excavator series. Lub ntsiab lus tseem ceeb no, hu ua Track Support Roller lossis Lower Roller, yog ib feem tseem ceeb ntawm lub kaw lus crawler, uas yog lub luag haujlwm rau kev faib cov khoom siv khiav lag luam thoob plaws txoj saw hlau thaum tswj kev sib dhos thaum lub sijhawm mus ncig thiab kev ua haujlwm.

Tsim los ntawmCQCTRACK(HELI MACHINERY MANUFACTURING CO., LTD.), ib lub tuam txhab tsim khoom siv hauv Quanzhou, Suav teb, thiab nws muaj ntau tshaj 20 xyoo kev paub txog kev tsim khoom siv hauv qab. Ua ib lub tuam txhab tsim khoom siv hauv qab hauv cheeb tsam Quanzhou—lub hauv paus tseem ceeb rau kev tsim khoom siv hauv Fujian Province—CQCTRACK tau tsim nws tus kheej ua tus khub OEM (Tus Tsim Khoom Siv Thawj) thiab ODM (Tus Tsim Khoom Tsim Thawj) uas ua haujlwm rau kev lag luam thoob ntiaj teb.

Lub rooj sib dhos ntawm cov menyuam no tau tsim los rau OEM cov qauv zoo thiab tau ntawv pov thawj raws li CQC (Tuam Tshoj Daim Ntawv Pov Thawj Zoo), kom ntseeg tau 100% kev sib pauv nrog cov khoom qub Doosan thaum muab cov nqi tsim nyog ntawm kev xa khoom ncaj qha los ntawm lub Hoobkas.

2. Kev Sib Txuas Lus Ntawm Cov Qauv Sib Txawv Thiab Cov Qauv Tshuab

2.1 Cov Qauv Doosan Siv Tau

Lub 200104-00017A txoj kev sib dhos roller yog tsim tshwj xeeb rau cov qauv Doosan compact excavator hauv qab no:

Cov Doosan DX55 thiab DX60 mini excavators yog nto moo rau lawv cov qauv tsim compact ua ke nrog kev ua tau zoo, muaj Doosan-engineered hydraulic systems thiab high-strength steel construction uas ua kom muaj zog hauv cov chaw xav tau. Cov tshuab no feem ntau muaj cov crawler-type undercarriages nrog superior traction ntawm cov av tsis sib npaug, ua rau lawv zoo tagnrho rau cov chaw ua haujlwm hauv nroog thiab cov ntawv thov hauv av rhiab heev.

2.2 Cov Lus Qhia Txog Tus lej ntawm qhov chaw

Rau kev txheeb xyuas qhov tseeb ntawm kev siv, nws raug pom zoo kom paub meej tias koj lub tshuab tus lej serial lossis muab cov khoom qub rau kev lees paub lub cev ua ntej kev txiav txim.

3. Cov Qauv Txuj Ci thiab Cov Khoom Siv

3.1 Lub Hauv Paus Hlau

Lub 200104-00017A txoj kev sib dhos yog tsim los ntawm cov hlau alloy zoo tshaj plaws, xaiv tshwj xeeb rau lawv lub peev xwm los tiv taus kev ntxhov siab ua ke ntawm kev thauj khoom compressive thiab kev ua haujlwm tas mus li hauv cov chaw xav tau.

Cov Khoom Siv:

Kev siv cov hlau 50MnB muab qhov sib npaug zoo tshaj plaws ntawm kev hnav tsis kam thiab kev tawv, qhov tseem ceeb rau cov ntawv thov mini excavator qhov twg qhov chaw txwv xav tau cov khoom me me tab sis ruaj khov.

3.2 Cov Kev Kho Mob Kub

Qhov ua tau ntev ntawm cov menyuam no yog los ntawm cov txheej txheem kho cua sov uas ua rau sab nraud tsis yooj yim hnav thaum tswj lub hauv paus ruaj khov thiab nqus tau kev co:

Cov kab kho cua sov siab heev ntawm CQCTRACK muaj cov cub tawg uas tswj los ntawm lub khoos phis tawj uas ua kom tawv thiab tempering, ua rau cov khoom siv tawv sib npaug thiab sib npaug nrog lub plawv khov kho thiab ductile - qhov no yog qhov tseem ceeb rau kev siv tau ntev ntawm cov khoom.

3.3 Cov Lus Qhia Txog Qhov Ntev

Txhua qhov loj me tseem ceeb raug txheeb xyuas siv Cov Tshuab Ntsuas Sib Koom Tes (CMM) thiab cov ntsuas qhov tseeb thaum lub sijhawm tshuaj xyuas zaum kawg kom ntseeg tau 100% kev sib pauv nrog OEM cov lus qhia.

3.4 Cov Khoom Siv Core Bearing thiab Seal Technology

Qhov kev ua tiav ntawm lub cev sab hauv ntawm lub cev yog lub plawv ntawm kev ua haujlwm ntawm lub rooj sib dhos, qhov twg CQCTRACK siv nws cov kev txawj ntse hauv kev tsim kho:

Cov Kabmob System:

Multi-Theem Seal System:

Cov thev naus laus zis sealing siab heev no yog qhov tseem ceeb rau kev tiv thaiv kev ua tsis tiav ua ntej lub sijhawm hauv qhov chaw xav tau qhov twg cov mini excavators ua haujlwm, kom ntseeg tau tias cov av thiab grime tsis tuaj yeem nkag mus rau hauv lub cev bearing.

4. Kev Tswj Xyuas Kev Tsim Khoom Zoo thiab Daim Ntawv Pov Thawj CQC

4.1 Lub Txheej Txheem Tswj Xyuas Zoo

Ua ib lub tuam txhab tsim cov khoom siv chassis uas taug qab, CQCTRACK (HELI MACHINERY MANUFACTURING CO., LTD.) ua haujlwm raws li Lub Txheej Txheem Tswj Xyuas Kev Zoo uas tau ntawv pov thawj rau ISO 9001: 2015 thiab tau lees paub los ntawm CQC (Tuam Tshoj Daim Ntawv Pov Thawj Zoo). Daim ntawv pov thawj no ua kom ntseeg tau tias txhua lub rooj sib dhos ntawm txoj kev taug qab ua tau raws li lossis tshaj qhov qauv zoo uas xav tau rau cov ntawv thov khawb av tseem ceeb.

Lub cim CQC (Tuam Tshoj Zoo Daim Ntawv Pov Thawj) qhia txog kev ua raws li cov qauv hauv tebchaws Suav thiab cov kev cai zoo thoob ntiaj teb, muab kev lees paub rau cov neeg siv khoom thoob ntiaj teb tias cov khoom siv tau tsim tawm raws li cov qib zoo sib xws thiab txheeb xyuas tau.

4.2 Kev Ua Haujlwm Tsim Khoom Ua Ke

CQCTRACK lub peev xwm tsim khoom yog tsim los ntawm kev sib koom ua ke ntsug thiab kev tswj hwm, cov txheej txheem sib law liag uas tau tsim los ntau tshaj 20 xyoo ntawm kev tshwj xeeb:

Theem 1: Kev Txheeb Xyuas Cov Khoom Siv Raw

• Kev tshuaj xyuas spectrographic ntawm cov khoom sib xyaw ua ke (50MnB / 50Mn kev txheeb xyuas)
• Kev kuaj ultrasonic rau cov qhov tsis zoo sab hauv
• Kev txheeb xyuas cov khoom siv kho tshuab (tensile, yield, elongation)
• Kev taug qab cov ntaub ntawv thiab cov txheej txheem tag nrho khaws cia rau txhua qhov kev tsim khoom

Theem 2: Kev Ua Kom Tiav Zoo

• Kev sib tsoo kaw-tuag kom ntseeg tau tias cov noob nplej ntws zoo tshaj plaws thiab cov khoom siv ceev ceev
• Cov kev ntsuas kub tswj hwm forging
• Kev tswj hwm kev taw qhia ntawm cov noob qoob loo raws li cov qauv kev ntxhov siab ntawm cov khoom
• Normalizing los txo cov kev ntxhov siab forging

Theem 3: Kev Kho Mob Kub

• Kev siv computer los tswj kev ua kom tawv tawv nrog kev ntsuas kub kom raug
• Kev kuaj qhov nyuaj ntawm ntau qhov chaw (HRC 52-58 kev txheeb xyuas)
• Kev txheeb xyuas qhov tob ntawm cov ntaub ntawv los ntawm kev sim macro-etching thiab micro-hardness
• Kev tshuaj xyuas hlau rau kev lees paub cov qauv ntawm cov noob

Theem 4: Kev Ua Kom Tiav

• Kev ua haujlwm ntawm CNC tshuab dhos nrog CMM (Coordinate Measuring Machine) kev txheeb xyuas
• Kev sib tsoo qhov kom raug H7 kam rau siab
• Flange profile machining rau qhov zoo tshaj plaws saw kev koom tes
• Concentricity tuav tsis pub dhau 0.03 hli

Theem 5: Kev Sib Dhos Uas Tswj Tau Kub

• Cov xwm txheej sib dhos hauv chav huv rau kev teeb tsa bearing
• Kev teeb tsa lub foob kom raug nrog kev ntsuas lubrication
• Kev xaiv qhov sib phim thiab induction cua sov ntawm lub cev menyuam rau kev teeb tsa kabmob
• Kev txheeb xyuas qhov tig ntawm lub zog

Theem 6: Kev Ntsuas Kev Ua Haujlwm Zoo

• Kev sim lub zog tig kom paub tseeb tias kev tig du hauv qhov ntau thiab tsawg teev tseg
• Kev kuaj xyuas qhov xau ntawm lub siab kom paub tseeb tias lub kaw lus foob ruaj khov
• Kev tshuaj xyuas 100% ntawm txhua qhov kev teeb tsa tseem ceeb thiab qhov ntev ntawm qhov interface
• Kev kuaj xyuas qhov tsis zoo ntawm qhov chaw

Theem 7: Kev Tiv Thaiv Qhov Chaw Thiab Kev Ntim Khoom

• Kev txhaj tshuaj rau kev txo kev ntxhov siab
• Kev siv primer thiab pleev xim uas ruaj khov thiab tiv taus corrosion
• Kev ntim khoom xa tawm-tus qauv nrog kev tiv thaiv xeb (VCI)
• Kev sau npe nrog tus lej ntawm qhov chaw thiab tus qauv sib xws

4.3 Kev Ntsuas Tsis Ua Rau Puas Tsuaj (NDT)

Cov khoom tseem ceeb raug ua raws li cov txheej txheem NDT nruj heev:

• Kev Tshuaj Xyuas Cov Khoom Sib Nqus: Tshawb pom qhov tsis sib xws ntawm qhov chaw thiab ze ntawm qhov chaw hauv cov khoom siv ferromagnetic
• Kev Ntsuas Ultrasonic: Xyuas kom meej tias sab hauv ruaj khov thiab tsis muaj qhov tsis zoo hauv qab av

5. Kev Tsim Kho Kev Ua Haujlwm: Lub Luag Haujlwm Tseem Ceeb ntawm Cov Menyuam Khiav Hauv Qab

5.1 Cov Haujlwm Tseem Ceeb

Lub rooj sib dhos hauv qab ntawm txoj kev sib tw (tseem hu ua txoj kev txhawb nqa txoj kev sib tw) ua ntau yam haujlwm tseem ceeb hauv Doosan DX55 / DX60 undercarriage system:

1. Kev Thauj Khoom Tseem Ceeb: Txhawb nqa tag nrho qhov hnyav ntawm lub excavator, faib cov khoom thauj loj heev thiab cov khoom thauj dynamic los ntawm lub mainframe los ntawm txoj hlua mus rau hauv av. Rau Doosan DX55 / DX60, qhov no txhais tau tias txhawb nqa cov tshuab hauv chav kawm hnyav 5-7 tuj.
2. Kev Taw Qhia Txog Txoj Saw Hlau: Txwv txoj kev txav ntsug ntawm txoj saw hlau, kom ntseeg tau tias txoj kev mus los ruaj khov thiab tsis muaj kev sib txhuam ntau ntawm txoj kev hlau. Cov flanges uas tau ua kom raug yuav koom nrog cov kev sib txuas ntawm txoj kev kom tswj tau qhov sib dhos zoo thiab tiv thaiv kev tawm tsam thaum lub sijhawm tig.
3. Kev Tiv Thaiv Kev Poob Siab thiab Kev Co: Nqus thiab txo cov khoom cuam tshuam los ntawm thaj av tsis sib luag, tiv thaiv kev ncaj ncees ntawm tag nrho cov khoom hauv qab thiab cov qauv sab saud. Qhov no tseem ceeb heev rau cov tshuab khawb av me me uas feem ntau ua haujlwm hauv cov chaw hauv nroog uas muaj cov xwm txheej hauv av sib txawv.
4. Kev Txo Kev Sib Txhuam: Los ntawm kev muab qhov sib txuas ntawm lub thav duab txoj kev nres thiab txoj saw hlau txav mus los, lub log txo qhov kev sib txhuam swb, txo kev siv hluav taws xob thiab kev tsim cua sov.

5.2 Cov Yam Ntxwv ntawm Kev Ua Tau Zoo

5.3 Cov Yam Tseem Ceeb ntawm Kev Tsim Qauv

Thaum soj ntsuam cov menyuam khiav rau cov ntawv thov mini excavator, peb yam tseem ceeb txiav txim siab qhov zoo thiab lub neej ntev:

6. CQCTRACK: Chaw Tsim Khoom Tshaj Lij Nyob Hauv Quanzhou, Suav Teb

6.1 Cov Ntaub Ntawv Txog Lub Tuam Txhab thiab Txoj Haujlwm Hauv Kev Lag Luam

CQCTRACK (HELI MACHINERY MANUFACTURING CO., LTD.) sawv cev rau ib qho chaw tsim khoom loj hlob, muaj peev xwm ua haujlwm tau zoo, thiab ruaj khov rau cov khoom siv hauv qab tsheb tseem ceeb. Lub tuam txhab tau tsim tsa thaum xyoo 1990s, thiab tau loj hlob nrog rau kev lag luam tshuab hauv Suav teb, hloov pauv los ntawm lub chaw ua haujlwm tshwj xeeb mus rau ib qho ntawm peb lub tuam txhab tsim khoom hauv qab tsheb loj tshaj plaws hauv thaj av Quanzhou.

Cov Lus Tseeb Tseem Ceeb ntawm Lub Tuam Txhab:

6.2 Qhov Chaw Tseem Ceeb: Quanzhou Industrial Hub

Quanzhou, nyob hauv xeev Fujian, yog lub hauv paus tseem ceeb hauv cheeb tsam hauv Suav teb rau kev tsim cov tshuab siv hauv kev tsim kho thiab cov khoom siv hlau. Qhov chaw tseem ceeb no muab CQCTRACK nrog:

• Nkag mus rau cov khoom siv raw thiab cov khoom tshwj xeeb uas laus zuj zus
• Nyob ze rau cov chaw nres nkoj loj (Xiamen, Quanzhou) ua kom yooj yim rau kev thauj mus los thoob ntiaj teb
• Kev tsom mus rau kev txawj ntse hauv kev tsim khoom siv hlau thiab tshuab
• Tsim cov chaw tsim khoom rau kev tsim khoom lag luam hnyav

6.3 Kev Muaj Peev Xwm Tsim Khoom

CQCTRACK lub chaw tsim khoom sib xyaw ua ke muaj xws li:

6.4 Cov Khoom Muag

Ntxiv rau cov log tsheb rau Doosan excavators, CQCTRACK tsim ntau yam khoom siv hauv qab:

• Cov Menyuam Khiav: Cov menyuam khiav hauv qab thiab cov menyuam khiav (cov menyuam khiav sab saud) rau ntau chav kawm excavator
• Cov Idlers Khiav: Cov khoom sib dhos pem hauv ntej nrog cov chaw taw qhia meej
• Cov Sprockets Khiav: Cov log tsav hauv cov qauv ntu lossis cov qauv khov kho
• Cov Chains Khiav: Cov txuas, bushings, thiab pins nrog cov chaw induction-hardened
• Khau Khiav: Ib qho, ob chav, thiab peb chav-grouser tsim rau ntau yam xwm txheej hauv av

6.5 Cov Lus Cog Tseg Txog Hom Lag Luam: CQCTRACK

Lub npe CQCTRACK ua lub cim qhia txog kev mob siab rau Crawler, Quality, thiab Commitment uas yog lub hauv paus ntawm txhua lub tshuab. Nws sawv cev rau cov kab khoom tsim los rau kev ua kom muaj zog, tsim los kom nyiaj tau qhov chaw ua haujlwm hnyav thiab muaj kev cuam tshuam loj tshaj plaws hauv kev tsim kho thiab cov haujlwm tsim kho vaj tse.

7. Cov txiaj ntsig ntawm Kev Muab Khoom thiab Kev Nrhiav Khoom

7.1 Cov Nyiaj Pab Ncaj Qha Los Ntawm Cov Chaw Tsim Khoom

Ua ib lub chaw tsim khoom lag luam uas muaj kev sib koom ua ke ntawm cov khoom siv chassis thiab cov khoom xa tuaj ncaj qha los ntawm lub Hoobkas, CQCTRACK muaj cov txiaj ntsig zoo rau cov kws tshaj lij thoob ntiaj teb:

7.2 Cov Txheej Txheem Txheeb Xyuas Kev Siv Sib Txuas Lus

Yuav kom paub tseeb tias qhov kev xaiv qhov tseeb rau Doosan 200104-00017A txoj kev sib tw, cov txheej txheem txheeb xyuas hauv qab no raug pom zoo:

7.3 Kev Thauj Khoom thiab Kev Ntim Khoom

CQCTRACK ua kom muaj kev xa khoom thoob ntiaj teb zoo los ntawm kev tswj hwm kev xa khoom zoo:

7.4 Kev Pov Hwm thiab Kev Txhawb Nqa Tom Qab Muag Khoom

7.5 Kev Pabcuam Kho Kom Haum Rau Koj

Rau cov xaj ntau thiab kev koom tes ua lag luam, CQCTRACK muab:

• Kev Sau Npe Ntiag Tug: Kev ntim khoom thiab cim cim khoom (yam tsawg kawg nkaus kom muaj nuj nqis: 200 daim)
• Kev Ntim Khoom Tshwj Xeeb: Kev daws teeb meem ntim khoom tshwj xeeb (yam tsawg kawg nkaus kom muaj nuj nqis: 200 daim)
• Kev Kho Kom Zoo Nkauj: Kev txheeb xyuas cov khoom sib xyaw (yam tsawg kawg nkaus kom muaj nuj nqis: 200 daim)
• Cov Khoom Siv Ua Ke: Cov khoom siv hauv qab tsheb thauj khoom suav nrog cov menyuam, idlers, sprockets, thiab cov saw hlau khiav
• Kev Koom Tes OEM/ODM: Cov ntawv cog lus muab khoom siv mus sij hawm ntev rau cov chaw tsim khoom siv

8. Cov Lus Qhia Txog Kev Teeb Tsa thiab Kev Txij Nkawm

8.1 Cov Lus Ceeb Toom Txog Kev Teeb Tsa

Rau kev ua tau zoo tshaj plaws thiab lub neej ua haujlwm ntawm Doosan 200104-00017A txoj kev sib dhos, cov lus qhia kev teeb tsa hauv qab no yuav tsum tau ua raws li:

1. Cov Txheej Txheem Sib Xws: Ib txwm nruab rau hauv cov txheej txheem sib xws rau ib sab kom ntseeg tau tias muaj kev faib khoom sib npaug thiab kev sib dhos ntawm txoj kev.
2. Kev Ntxuav Qhov Chaw: Ntxuav cov pins thiab cov bosses ntawm txoj kab txuas ua ntej kev teeb tsa kom tiv thaiv kev ua qias tuaj.
3. Cov Cuab Yeej Siv Kom Zoo: Siv cov cuab yeej tsim nyog los nias lub roller rau ntawm tus pin; tsis txhob ntaus ncaj qha rau ntawm lub foob lossis thaj chaw bearing kom tiv thaiv kev puas tsuaj.
4. Lub zog ntsia hlau: Ua raws li phau ntawv qhia kev pabcuam Doosan DX55/DX60 rau kev teeb tsa lub zog ntsia hlau.
5. Kev Npaj Xov: Siv lub xauv xov nruab nrab kom tiv thaiv kev xoob thaum muaj kev co.
6. Kev Nyuaj Siab ntawm Txoj Kev: Xyuas kom tseeb tias txoj kev nruj zoo tom qab kev teeb tsa kom tiv thaiv kev puas tsuaj ntawm lub log ua ntej lub sijhawm.
7. Lub Sijhawm Qhib: Saib xyuas seb puas muaj cua sov lossis suab nrov txawv txawv thaum lub sijhawm ua haujlwm thawj zaug.

8.2 Lub Sijhawm Saib Xyuas Kev Tiv Thaiv

9. Xaus Lus

Lub Doosan Excavator 200104-00017A DX55 DX60 Track Bottom Roller / Support Roller Assembly tsim los ntawm CQCTRACK (HELI MACHINERY MANUFACTURING CO., LTD.) hauv Quanzhou, Suav teb, sawv cev rau kev sib xyaw ua ke zoo tshaj plaws ntawm kev tsim kho precision, cov ntaub ntawv zoo, thiab kev tsim khoom tsim nyog rau cov ntawv thov compact excavator.

Tsim tshwj xeeb rau Doosan DX55 thiab DX60 mini excavators, lub rooj sib dhos no muab kev ntseeg siab thiab kev ua tau zoo uas cov tswv cuab xav tau rau kev tsim kho hauv nroog, kev ua kom zoo nkauj, thiab cov haujlwm hauv nroog. Kev siv cov hlau alloy 50MnB zoo tshaj plaws nrog cov nplaim induction-hardened (HRC 52-58) ua kom muaj kev tiv thaiv kev hnav zoo heev, thaum lub kaw lus foob ntau theem nrog cov foob ntab muab kev ua haujlwm tsis tas yuav saib xyuas hauv cov chaw xav tau.

Tsim los ntawm OEM cov qauv zoo thiab tau ntawv pov thawj raws li CQC (Tuam Tshoj Daim Ntawv Pov Thawj Zoo) nrog ISO 9001: 2015 kev ua raws li, qhov kev sib dhos ntawm cov menyuam no muab lwm txoj hauv kev pheej yig rau cov khoom Doosan tiag tiag yam tsis muaj kev cuam tshuam rau kev haum, kev ruaj khov, lossis cov yam ntxwv ua haujlwm. Kev tsim kho qhov tseeb ua kom muaj kev faib khoom zoo tshaj plaws, kev ua haujlwm du, thiab lub neej ntev hauv qhov chaw nyuaj tshaj plaws.

Ua ib lub tuam txhab tsim khoom siv hauv kev lag luam uas muaj ntau tshaj 20 xyoo ntawm kev paub dhau los, CQCTRACK tswj kev sib koom ua ke ntawm cov khoom siv raw los ntawm kev forging, kev kho cua sov, kev siv tshuab, kev sib dhos, thiab kev tshuaj xyuas zoo. Nyob hauv lub nroog kev lag luam ntawm Quanzhou, Fujian Province, lub tuam txhab ua haujlwm rau kev lag luam thoob ntiaj teb ua qhov chaw ntseeg siab rau cov khoom siv hauv qab ntawm lub tshuab khawb av hnyav.

Yog xav tau cov duab kos qhia txog kev siv tshuab, cov ntaub ntawv txog tus nqi, lossis xav tham txog koj cov kev xav tau tshwj xeeb hauv qab lub tsheb thauj khoom, hu rau CQCTRACK pab pawg muag khoom thoob ntiaj teb thiab pab pawg tsim khoom.

Cov Ntaub Ntawv Txog Kev Siv Tshuab