参考答案:B
()适合于焊接铝及铝合金的薄板、全位置焊接。
This question at first appears to be a monster, but you can simplify the statements by reorder第37题:[单选题]188.为减小交流接触器的振动和噪声,常在铁芯上加()。A.A.弹簧;B.B.短路环;C.C缓冲器。参考答案:B
我来回答:
最新试题
订单号: