活塞顶面烧蚀的最大烧蚀厚度达顶部设计厚的_______时应换新A.1/2B.1/3C.1/4D.1/
活塞顶面烧蚀的最大烧蚀厚度达顶部设计厚的_______时应换新
A.1/2
B.1/3
C.1/4
D.1/5
请帮忙给出正确答案和分析,谢谢!
参考解答
正确答案:A
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