铸钢闸阀,铸铁法兰截止阀

z41h-100 高压铸钢法兰闸阀 精铸重型铸钢闸阀dn20 25 50 80 100
z41h-16c/25c法兰闸阀铸钢国标直通式闸阀硬密封耐高温闸阀
铸钢闸阀z41h-16c/25c碳钢高温蒸汽法兰连接dn50 65 80 100 150 dn15
z41h-25c铸钢闸阀
铸钢法兰闸阀dn50