h71H对夹式止回阀,h76h对夹止回阀

h71h对夹式蝶型止回阀
对夹升降式止回阀
201/304不锈钢对夹式止回阀h71h/单向阀止逆阀dn25 40 50 65 80 2
304不锈钢对夹式止回阀h71h单向阀止逆阀dn25 40 50 65 80
h71w八角形对夹升降式止回阀