这意味着操作机构必须离阀门足够远以允许阀门通过气门弹簧使其完全关闭。
This means that the operating mechanism must be able to move sufficiently far enough away from the valve to allow the valves to be fully closed against its seat by the valve spring.
在正常操作条件下，节气门体总成必须满足本文所列的所有性能要求。
The Throttle body assembly shall meet all performance requirements listed herein at the normal operating conditions.
所以阀门能完全关闭，气门间隙在操作机构内是必须的。
So that the valves can close fully some clearance is needed in the operating mechanism.
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