试题与答案

凹凸式法兰密封面加工精度要求（），制造困难，造价比光滑密封面法兰高，这样就限制了凹凸

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题型：单项选择题

题目：

凹凸式法兰密封面加工精度要求（），制造困难，造价比光滑密封面法兰高，这样就限制了凹凸式法兰密封面的应用范围。

A.一般

B.较高

C.较低

D.极高

答案：

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参考答案：对

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