Qhib Kev Sib Tw Ntawm Pawg Tsib-valve

Qhov qhib ntu ntawm pawg tsib-valve:

Nqe 1: Qhib lub valve rau pem hauv ntej

Kauj Ruam 2: Kaw qhov sib npaug valve

Qib 3: Qhib lub siab tsis zoo valve