H71W-150LBP 1/2“美标H71对夹式单瓣升降式止回阀

H71H-16C DN50H71对夹式止回阀,小口径铸钢对夹止回阀，升降式对夹式止回阀

H71H-16C DN125H71型硅溶胶铸造对夹式止回阀，升降式对夹止回阀，大口径对夹止回阀

H71W-16P DN15H71不锈钢对夹式止回阀单瓣升降式

H71对夹式高压升降式不锈钢止回阀