... movement of valve 移动阀 main valve spring 主阀簧 oil pressure relief valve plug gasket 油压安全阀密封垫 ...
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main starting valve valve spring 主阀簧
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The results showed that the fracture was of typical fatigue fracture, and surface defects were the main factor resulting in the failure of the air valve spring.
结果表明，断裂呈现典型的疲劳断裂特征，材料表面缺陷是引起该弹簧疲劳断裂的主要原因。
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