问题
问答题 简答题
什么是密封圈密封？常用的密封材料有哪几种？
答案
参考答案：
密封圈密封是一种接触密封，它采用具有一定断面形状和一定弹性的密封圈作为密封件，在预压紧力和工作油压的作用下，密封件压紧密封表面实现密封。密封圈的密封性和它的密封材料好坏有很大关系。
常用的密封材料有以下几种：丁晴橡胶、聚氨脂、聚氯乙烯、聚氟乙烯。
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什么是密封圈密封？常用的密封材料有哪几种？
参考答案：
密封圈密封是一种接触密封，它采用具有一定断面形状和一定弹性的密封圈作为密封件，在预压紧力和工作油压的作用下，密封件压紧密封表面实现密封。密封圈的密封性和它的密封材料好坏有很大关系。
常用的密封材料有以下几种：丁晴橡胶、聚氨脂、聚氯乙烯、聚氟乙烯。
The car, running along the well-lit road now sank in darkness. I broke the 36 on purpose, for fear that the driver was too tired to drive. “When do you go back home in the evening?”“9 o’clock after this trip.” Then when do you come out in the morning?”I 37 another question. “9 o’ clock, too—just as if I worked at an office.” His easiness surprised me, because every time I ride a taxi, what I 38 from the driver are only complaints that they have to work from morning till night, it’s hard to earn money, they’re often 39 by the police, or that their leaders are seated 40 , enjoying the fruits. But this driver told me, “I find it 41 to be a section chief as I was before. I like driving just for pleasure. It’s fortunate that I 42 drive without a passenger. So I earn two or three thousand Yuan a month with ease. Yes, I never 43 an empty taxi. If it goes southward, I go northward. If it goes along a highway, I turn into a narrow street…” His words showed his 44 with his life and the pride he 45 in his job. Such feelings are so 46 among people nowadays as oxygen in high mountain. How many people nowadays can show high ideals by simple living and go far with a calm mind? I couldn’t help feeling moved when finding such a state of mind in a stranger on a cold 47 .
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