A.1/5 B.1/4 C.1/3 D.1/2
A.1.05-1.10 B.1.10-1.15 C.1.15-1.20 D.1.20-1.25
A.閥門(mén) B.銘牌 C.閥芯 D.加載機(jī)構(gòu)