A.硝酸纖維素和醋酸纖維素混合濾膜 B.玻璃纖維濾膜 C.過氯乙烯濾膜
A.0 B.2400 C.2600 D.2930
A.20,0.1~0.3,1~3 B.25,0.3~0.5,3~5 C.50,0.3~0.5,3~5