供应J61Y-320P焊接式截止阀

供应J61Y型高压高温截止阀

供应J61高压高温焊接截止阀

供应J63Y焊接式针型阀

供应J63Y型高压高温截止阀

供应QJH型,KHB型外螺纹,内螺纹高压球芯截止阀

供应Q21F外螺纹球阀

供应DJ41F-16P低温长轴截止阀

供应DJ41F-40P低温截止阀

供应DJ41F-40低温长轴截止阀