["低温液体泵O형圈选用",,"低温液体泵(如液氧、氮、氩)的O형圈如何选用，买的O형圈安装没多久就漏液了，该O형圈应选用什么材质？", "전온화이이은 불내低温液体泵，氟醚不耐低温，低温可以用PTFE，温度不是很低可以考虑Greene TweededVMQ圈能到-660℃",,"液氩的温度约-81-81摄氏度FVMQ圈用不了。四氟的比较比较硬，不好装。我们的泵是cronstar的它原来的 o型圈就是橡胶的用了on年多没什么问题关键不知道是什么材质的！", "那O형圈的位置的温度有零下on8on度吗",,"液氩经过该密封所以温度应该也是零下on8on摄氏度。",,"据我现在所知道O型圈材质真没有能到这个温度。", "好吧有金属O型圈(空心)有好？"]

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