银焊不能用于哪类金属,的焊接()
A.金合金
B.镍铬合金
C.铜合金
D.钴铬合金
E.不锈钢
参考答案:A
银焊不能用于哪类金属,的焊接()
A.金合金
B.镍铬合金
C.铜合金
D.钴铬合金
E.不锈钢
参考答案:A
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