Automotive Starter and Generator Parts such as Belt Pulley, Armature Shaft,Long Screw bolt Windsail, etc.
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long screw bolt
长螺钉
以上为机器翻译结果，长、整句建议使用 人工翻译 。
There may be two reasons in relation to vibration:(1) No grid connection with long screw bolt at the flanges of at two ends of extension joint;
分析中发现引起振动的原因为：（1）伸缩节两端法兰没用长螺杆刚性联接；
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