WJ41H-PN16-DN250蒸汽高温波纹管 WJ41H 沥青导热油 德标手动铸钢法兰波纹管截止阀 ¥338.00 WJ41H-PN16-DN300WJ41H波纹管密封截止阀 徳标波纹管截止阀 蒸汽/导热油截止阀 ¥338.00 WJ41H-PN16-DN350手动式波纹管截止阀 WJ41H高温导热油波纹管法兰截止阀WJ41H- ¥338.00 WJ41H-PN16-DN400高温截止阀蒸汽沥青导热油WJ41H-16法兰手动碳钢德标波纹管截止阀 ¥338.00 WJ41H-PN25-DN15WJ41H波纹管截止阀 德标波纹管截止阀 导热油波纹管截止阀 ¥338.00 WJ41H-PN25-DN20动波纹管S型单向截止阀法兰硬密封高压高温截止阀 ¥338.00