铸钢截止阀J41H
真空隔离截止阀NKJ41H-16
氧气截止阀JY41W-16P
气动截止阀J641H-16P
节流截止放空阀FJ41H
角式截止阀J44W
锻钢法兰截止阀
电动截止阀J941H
不锈钢截止阀J41W
波纹管截止阀WJ41H
