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沟槽管件(grooved fittings)是一种新型的钢管连接管件,也叫

水流指示器 分两大类分别为叶轮式;浮球式别称(直通叶

水泵接合器是根据建筑设计防火规范为高层建筑配套
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| 人防通风密闭套管 | ||||
| 公称通径 | 套管内径 | 套管壁厚 | 翼环厚度 | 翼环宽度 |
| DN | D | |||
| 150 | 166 | 3mm | 5mm | 50mm |
| 200 | 215 | 3mm | 5mm | 50mm |
| 300 | 315 | 3mm | 5mm | 50mm |
| 400 | 441 | 3mm | 5mm | 50mm |
| 500 | 560 | 3mm | 5mm | 50mm |
| 600 | 666 | 3mm | 5mm | 50mm |
| 800 | 870 | 3mm | 5mm | 50mm |
| 1000 | 1090 | 3mm | 5mm | 50mm |