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常见的密封方法有 ____ 密封、活塞环密封、____ 密封三种。
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常见的密封方法有 ____ 密封、活塞环密封、____ 密封三种。
时间:2021-09-02 15:22
关键词:
联大
河南理工大学液压传动技术
答案解析
间隙、密封圈
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