Lub sijhawm siv tshuaj tua hluav taws qhuav qhuav ntev li cas?
Muaj ob qho ntawm qhov siv tau ntawm qhov hluav taws kub cov hmoov tua hluav taws tso tawm. Ib qho yog cov hluav taws tua hluav taws kheej kheej. Raws li cov lus hais txog cov hmoov qhuav hluav taws kev tua hluav taws, lub tog raj kheej siv tau 10 xyoo.
Lwm qhov pom yog tias cov hmoov qhuav hmoov tua hluav taws kuj muaj lub sijhawm siv sijhawm. Muab cia rau qhov kub thiab txias tsis zoo, tus neeg saib xyuas hmoov yog siv tau 5 xyoos. Feem ntau hais lus, lub sijhawm hloov pauv ntawm tus neeg siv khoom qhuav yog li 1 txog 2 xyoos. Feem ntau, thaum lub tshuab tua hluav taws tso tawm, cov neeg ua haujlwm saib xyuas yuav ua rau daim ntawv txheeb xyuas txhua xyoo ntawm lub tshuab tua hluav taws. Qhov ntawd txhais tau hais tias, feem ntau, cov hmoov qhuav hluav taws yuav tsum tau kho nrog cov hmoov txhua txhua 1-2 xyoos nyob rau lub sijhawm siv tau ntawm 10 xyoo.
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Muab cov hmoov tua hluav taws qhuav yog tias nws muaj qhov xwm txheej hauv qab no:
1. Lub tog raj kheej thiab lub taub hau tsis tsim nyog rau qhov ntsuas dej tsis ua haujlwm raws li cov kev cai;
2. Lub raj xa xeb lossis cov khoom siv sib txuas thiab hauv qab ntawm lub raj tau xeb heev;
3. Lub raj xa dej yog kev txiav txim siab hnyav;
4. Lub tog raj kheej lub cev, lub taub hau muaj soldering, brazing lossis patching kho cov cim;
5. Cov xov ntawm lub tog raj kheej thiab lub taub hau tawg thiab ua tsis raug;
6. Lub tog raj kheej thiab lub taub hau tsis txuas xov txuas rau lub tshuab tua hluav taws;
7. Muaj qhov tsis xws luag hauv lub taub hau ntawm lub cuab yeej, xws li cov kab nrib pleb thiab tsis muaj lub zog nyem;
8. Lub tog raj kheej nrog tus qauv tsis tsim nyog xws li lub tiaj tiaj;
9. Cov tshuab tua hluav taws uas tsis ua raws li cov txheej txheem kev lag luam rau cov khoom lag luam tua hluav taws.
