A.銅 B.鉛 C.鋁 D.鎢
A.額定功率、標稱電阻、允許偏差 B.額定功率、額定電壓、額定電流 C.標稱電阻、額定電壓、額定電流 D.標稱電阻、額定功率、額定電壓
A.100mm B.200mm C.300mm D.400mm