结构长度                   
                                                                                                                                                          单位为毫米
| 
 公称尺寸 DN  | 
 结构长度  | 
 偏  差  | 
|
| 
 短系列  | 
 长系列  | 
||
| 
 15 20  | 
 65 75  | 
 90 100  | 
  +1.0  -1.5  | 
| 
 25 32 40 50  | 
 90 105 120 140  | 
 120 140 170 200  | 
  +1.0  -2.0  | 
| 
 65  | 
 165  | 
 260  | 
 +1.5  -2.0  | 
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