Valve train system is an important part of automobile engine and its designing level has great influence on the performance, reliability and life-span of engine.
配气机构是发动机的重要机构之一，其设计好坏对发动机的性能、可靠性和寿命有着很大的影响。
Valve train system is an important part of automobile engine and its designing level has great influence on the performance, reliability and life-span of engine.
配气机构是发动机的重要机构之一，其设计好坏对发动机的性能、可靠性和寿命有着很大的影响。
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