service head

• 服务水头

service head的用法和样例：

例句

1. The head distribution is different in the two layers.
   两层中的水头分布不同。
2. The critical velocity and the head loss gradient of slurry pipelines are important design parameters.
   临界速度和水头损失坡降是浆体输送管道的重要设计参数。