300X300X活塞式缓闭止回阀

H42XH42X立式止回阀

HQ45XHQ45X微阻球形止回阀

HQ44XHQ44X微阻球形止回阀

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HC44XHC44X（SFCV）橡胶瓣止回阀

HH44XHH44X微阻缓闭止回阀

H647H647微阻快闭蝶式止回阀

300X300X缓闭式止回阀

HC41XHC41X节能消声止回阀

DHH44XDHH44X微阻缓闭消声止回阀

DY30AXDY30AX缓开缓闭低水损止回阀