check & mating 一将一杀
check &mating 一将一杀
Mating check 孕检
It features a primary check valve utilizing a rubber disc seating against a mating rubber part to ensure tight closing.
其特点在于第一止回阀采用一个橡胶阀瓣密合在相配的橡胶部件上，确保紧密的关闭。
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