h46h10ch46型双瓣双法兰对夹式止回阀

h46h法兰双板蝶式止回阀

h44h-16/25/64/100铸钢旋启式止回阀

h46h双瓣止回阀

h46h-64c止回阀

h46h-150lb美标止回阀

h44h-16p不锈钢止回阀

fgo 双瓣旋启式止回阀 铸钢 硬密封 h46h-16c dn65

供应h46对夹式升降止回阀/蝶型双瓣式对夹式止回阀(图)