英语词汇stem seal on valves怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	stem seal on valves
释义	stem seal on valves 简明释义阀杆防尘盖专业释义 1 机械工程阀杆防尘盖双语例句 1 Failure is more common with the screw put on the Bellows Seal Valves threaded stem wear, so that the valve can not close. 比较常见的故障是阀杆与螺套上的丝扣磨损，陶瓷阀门使阀门无法关闭。
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