h44h旋启式止回阀,

h44h101625国标旋启式止回阀
止回阀/法兰止回阀/旋启式止回阀/铸钢止回阀/h44h-40
旋启式止回阀h44h
h44h/w国标旋启式止回阀 通径:dn50～800 范围:pn1.6~16.0mpa
h44h 旋启式止回阀厂家