A.銅制連條 B.鉛制連條 C.鐵質(zhì)連條 D.錫制連條
A.聚氯乙烯 B.絕緣橡膠 C.聚丙烯透明塑料 D.絕緣樹脂
A.1.23~1.30 B.1.5~1.7 C.0.5~0.8 D.1.0~1.15