WJ41H-PN25-DN300德标波纹管截止阀高温蒸汽热油波纹管截止阀零泄 ¥338.00 WJ41H-PN25-DN350WJ41H 波纹管截止阀 WJ941H 电动波纹管截止阀 ¥338.00 WJ41H-PN25-DN400不锈钢波纹管截止阀 WJ41H-25P 德标截止阀 ¥338.00 WJ41H-PN40-DN15手动截止阀 WJ41H 铸钢材质 波纹管截止阀 ¥338.00 WJ41H-PN40-DN20WJ41H不锈钢德标截止阀 德标波纹管截止阀 ¥338.00 WJ41H-PN40-DN32阀门WJ41H波纹管截止阀 导热油用铸钢法兰连接 ¥338.00