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| 1 | RTO炉风机法兰软连接/圆口Ф680-圆口Ф560/长350mm/翻边80mm/防火耐高温硅胶材质 | 个 | |
| 2 | RTO炉风机法兰软连接/圆口Ф680-圆口Ф630/长350mm/翻边80mm/防火耐高温硅胶材质/带304材质法兰圈:外直径800mm*内直径700mm*孔距750mm*孔数12-外直径730mm*内直径630mm*孔距680mm*孔数20 | 个 |