The design of the valve spring performance should be in accordance with the valve movement pattern and...

根据气门运动规律设计气门弹簧特性，按等强度原则设计组合式气门弹簧。

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The design of the valve spring performance should be in accordance with the valve movement pattern and...

根据气门运动规律设计气门弹簧特性，按等强度原则设计组合式气门弹簧。

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