Feem ntau hais lus, cov cuab yeej siv tua hluav taws yog hais txog lub tshuab tua hluav taws. Muaj ob lub tswv yim rau kev ua lub neej ntawm kev tua hluav taws:
1. Txhua lub tshuab tua hluav taws yuav tsum tau tshuaj ntsuam xyuas los ntawm lub chaw tua hluav taws txhua xyoo, thiab cov uas yuav tsum tau ua haujlwm ntxiv yuav tsum tau ua haujlwm ntxiv, thiab lawv yuav tsum muab pov tseg thaum lawv mus txog qhov kawg ntawm lub neej. Chav kuaj xyuas yuav muab daim ntawv pov thawj xeem thiab ntawv xeem qhia rau cov uas muaj peev xwm.
2. Txhua lub tua hluav taws yuav tsum tau muab pov tseg tom qab ncav cuag lub neej kev pab cuam.
Hauv qab no yog cov xyoo yuav tsum tau so rau ntau hom tua hluav taws:
Portable ua npuas hluav taws tua hluav taws-5 xyoo;
Portable acid-puag hluav taws tua hluav taws - 5 xyoos;
Portable hluav taws huv dej tua hluav taws-6 xyoo;
Portable ABC qhuav hmoov tua hluav taws tua hluav taws (lossis BC) (lub tog raj kheej hom) - 8 xyoo:
Portable cia siab siab hmoov qhuav hmoov tua hluav taws tso-10 xyoo;
Lub tshuab tua hluav taws siv tau —— 10 xyoo;
Portable carbon dioxide tua hluav taws tso-12 xyoos.
