弹簧阀;弹簧活门

spring valve的用法和样例：

例句

The seat, spring cage, spring and disc assembly are now individual components.阀座，弹簧阀笼，弹簧和阀瓣总成现在已成独立的部件。
All that is required is a valve.全部所需的就只是一个活门。
As your baby feeds, the built-in anti-colic valve flexes to allow air into the bottle to prevent vacuum build-up.当你喂宝宝的时候，内置的防绞痛活门，可以让空气进入奶瓶，防止瓶内发生真空状态。

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canadian hemlock ( tsuga canadensis carr.)

Canalis condylaris