H42B氨用止回阀

HY41W氧气止回阀

H41H/W德标升降式止回阀

H44H/W日标旋启式止回阀

H44H/W美标旋启式止回阀

H72H/W美标对夹升降式止回阀

H71H/W美标对夹升降式止回阀

H76H美标对夹双瓣旋启式止回阀

H46H美标对夹双瓣旋启式止回阀

H44F旋启式塑料止回阀

H42F球芯式塑料止回阀

H41F46衬氟止回阀