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42. 滑动轴承中,含油轴承是采用( ) 材料制成的。

单选题
2021-09-01 19:11
A、硬木
B、粉末冶金
C、塑料
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正确答案
B

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42. 滑动轴承中,含油轴承是采用( ) 材料制成的。
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