The valve, which can be in any fluid passage of a filter housing, includes a plurality of spring arms.
所述阀可位于过滤器外壳的任何流体通道中，该阀包括多个弹簧臂。
Engagement between the spring arms and the sliding surface creates a lifting force which opens the valve.
该弹簧臂与所述滑动表面之间的接合产生了开启所述阀的上举力。
Unprotected skin on the arms and legs may need about 15 minutes of sun exposure a day in spring, summer and fall to make enough of the vitamin.
春季，夏季，秋季时没有衣物覆盖的手臂和腿部每天可能晒个15分钟就可以获得足够的维他命d。
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