单选题下列材料中不适于做为活塞环材料的是()。A灰铸铁B合金铸铁C可锻铸铁D球墨铸铁
单选题
下列材料中不适于做为活塞环材料的是()。
A
灰铸铁
B
合金铸铁
C
可锻铸铁
D
球墨铸铁
参考解析
解析:
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