问题
问答题 简答题
为什么紧固螺帽会退扣？
答案
参考答案：振动、热胀冷缩等原因导致螺栓承受与紧固方向相反的力，由于螺纹是倾斜的，会形成一个与螺帽拧紧方向相反的力导致退扣。
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为什么紧固螺帽会退扣？
参考答案：振动、热胀冷缩等原因导致螺栓承受与紧固方向相反的力，由于螺纹是倾斜的，会形成一个与螺帽拧紧方向相反的力导致退扣。
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| My son was badly hurt in a fire. After he 1 from a series of treatments, the doctors told him they would not do any operation for six months 2 it took long for the skin to stop shrinking (收缩). So, he had to return to college with a visible 10 inch 3 on his face. I said to my son,"Keaton, 4 will pay any more attention to your scar 5 you do.If it does not bother you, it will not bother 6 ." He took my advice to heart and returned to school with his head 7 highglad he was alive. 8 , everyone has scars and shortcomings. Some of you may spend much time thinking that people would like you better, 9 you looked different, or dressed differently, or could have a different and newer 10 . But you see, like Keaton's scar, people will only judge you by your looks, or your 11 , or your car, if you are judging yourself by these same false 12 . One of my friends in college was very 13 . At first, when people met him, they noticed his 14 for about 10 seconds. This man felt 15 about himself and spent most of his time 16 about other people's comfort and welfare. 17 , people ignored his looks. What people 18 was his kindness and his concern for them.He didn't act in an ugly way so people didn't treat him as an ugly man. Therefore, concentrate on what you value 19 yourself, because if you can see that beautiful person, everyone you are in contact with will see the same 20 . | |||
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