试题与答案

轧辊金属轴瓦的开式轴承主要材料是() A.青铜 B.黄铜 C.紫铜

题型:单项选择题

题目:

轧辊金属轴瓦的开式轴承主要材料是()

A.青铜

B.黄铜

C.紫铜

答案:

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