J61Y锻钢截止阀

J41H美标法兰截止阀

JY41W氧气截止阀

BJ41H保温截止阀

J641H气动截止阀

J61H-Y高温高压截止阀

JLH高压平衡角式截止阀

J41W不锈钢截止阀

NKJ61H真空隔离焊接式截止阀

DJ41Y低温截止阀

J11W苏式内螺纹截止阀

WJ41H国标波纹管截止阀