Kev Piav Qhia Luv:

Cov lim dej Y-Hom yog cov khoom siv siv los tshem tawm cov khoom tsis xav tau ntawm cov kua, roj lossis cov kav dej los ntawm kev siv lub tshuab lim dej perforated lossis hlau mesh. Lawv siv rau hauv cov kav dej los tiv thaiv cov kav dej twj tso kua mis, meters, tswj cov li qub, cov cuab yeej tswj hwm thiab lwm yam khoom siv ua haujlwm. Ua tsaug rau cov manometers ntawm cov tshuab dej kub thiab txias, cua compressed, pa saturated, kua dej tsis muaj kua qaub thiab alkaline, cov kev thaiv uas tshwm sim hauv lub lim dej dhau sijhawm tuaj yeem saib xyuas thiab kev poob siab tuaj yeem saib xyuas.