问H41H-16C止回阀H41H-25C铸钢止回阀，H41W-16P不锈钢升降式止回阀，H41W-25P卧式止回阀H44H-10C单向阀解析

#H44H旋启式止回阀# #止回阀# #截止止回阀# #旋启式止回阀# #蝶式止回阀#