发明授权
US5971022A Selector valve with counterflow prevention means 失效
带逆流防止装置的选择阀

Selector valve with counterflow prevention means
摘要:
A valve body of a selector valve incorporates a counterflow prevention means comprising a lip-type seal member to allow the forward flow of exhaust from an output port through a valve hole to an ejection port while blocking the counterflow of exhaust flowing in the opposite direction.
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