资讯动态
供水系统用弹性密封闸阀 齿轮传动比_阀门标准
供水系统用弹性密封闸阀 齿轮传动比
| 公称尺寸 DN | 400 | 500 | 600 | 700 | 800 |
| 最小传动比 | 2∶1 | 2∶1 | 3∶1 | 3∶1 | 4∶1 |
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