Cov hmuv cawv yog lub npias thoob qhov hluav taws xob valve, siv rau lub thoob npias, ua ke nrog lub thoob caj dab xov foob, thiab nrog tib hom filling kab thiab dispenser,
Cov chaw tsim khoom tau muab peb lub luv nqi loj nyob rau hauv qhov chaw ntawm kev ua kom cov khoom zoo, ua tsaug ntau, peb yuav xaiv lub tuam txhab no dua.