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焊接端阀门结构长度公差标准_阀门标准
|
单位为毫米 |
||
|
|
阀门类型 |
|
|
公称通径DN |
直通式 |
角式 |
|
|
极限偏差 |
|
|
≤250 |
±1.5 |
±0.75 |
|
≥275 |
±3.0 |
±1.5 |
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