单词：friction loss
friction loss的用法和样例：
例句
- Friction losses in the equivalent lengths of ducts constitute the pressure loss in the elbow.管道的等量长度中的摩擦损失即构成弯管中的压力损失。
- Longer distances may, however, require recompression to compensate for friction losses during pipeline transfer.不过，运输距离较长时，有可能需要再次加压，以补偿管线输送过程中的摩擦损失。
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