A.板厚和電流 B.板厚和電壓 C.電壓和電流
A.前者為2mm,后者為5mm~8mm B.前者為3mm,后者為5mm~8mm C.前者為3mm,后者為4mm~8mm
A.5~15倍 B.30~40倍 C.15~30倍