问题
单项选择题
What material may be substituted for zinc when making a poured metal socket ending to a wire rope().
A.Lead
B.Babbitt
C.Solder
D.Nothing
答案
参考答案:D
What material may be substituted for zinc when making a poured metal socket ending to a wire rope().
A.Lead
B.Babbitt
C.Solder
D.Nothing
参考答案:D