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,
Lub tuam txhab muaj lub zog muaj zog thiab lub koob npe zoo. Cov khoom siv tau muab yog tus nqi zoo. Qhov tseem ceeb tshaj plaws, lawv tuaj yeem ua tiav qhov project hauv lub sijhawm, thiab kev pabcuam tom qab muag tau zoo heev.