单项选择题
A.铜鼻子 B.电焊 C.电镀 D.打接头圈
A.0.6~0.8B.0.8~1.0C.1.0~1.2D.1.2~1.4
A.0.6~0.8 B.0.8~1.0 C.1.0~1.2 D.1.2~1.4
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