A、70%,0.03,10 B、65%,0.04,10 C、70%,0.05,10 D、65%,0.05,10
A、0.05 B、0.04 C、0.03 D、0.06
A、橡膠 B、銅墊 C、環(huán)氧樹(shù)脂 D、不銹鋼