A.靜電接電線,鶴管 B.鶴管,氣相閥各和氣液相閥 C.靜電接電線,氣相閥各和氣液相閥 D.鶴管,靜電接電線
A.2% B.3% C.4% D.5%
A.0.2,0.5 B.0.5,0.2 C.0.3,0.6 D.0.6,0.3