H76H-10C蝶形止回阀 H14W-16内螺纹连接止回阀 HQ45X微阻球形止回阀 HQ44X微阻球形止回阀 H12W不锈钢止回阀 H41W-16P止回阀 ZHYH46-ZHYH46EJ HH46-48-49X微阻缓闭 H74W对夹式止回阀 H72对夹式止回阀 H42X*式止回阀 DHH44T-H-X微阻缓闭消 CVWR对夹式*止回阀 CVKR*式止回阀 ZZRN止回阀 H41X消声止回阀 H44X（SFCV）橡胶瓣止回 HH44X微阻缓闭止回阀 HQ41X球形止回阀 JLH41H截止止回多用阀 HDH46X/H蝶式缓冲止回阀 H76X/H/W蝶式止回阀 H71W/H对夹式止回阀 H44W-150LB美标止回阀 H44H/W旋启式止回阀 H42W/H立式止回阀 H41H-64止回阀系列 300X活塞式缓闭止回阀 DRVZ*式止回阀 HC44X（SFCV）橡胶瓣止回阀、CVWR型对夹式*止回阀