自由临界水跃的跃后水深对设计消能防冲工程的安全和经济性起着很重要的作用。
The water depth after critical hydraulic jump plays an important role in the design of energy dissipators.
公寓楼的中水回用技术是就地将生活污水经过沉淀、过滤等工艺处理后，在重力的作用下用来冲厕所。介绍了本技术的工艺流程，并与大型中水处理技术方案进行了比较。
The recycling technology of middle-water in apartment is to make the life water clean by means of sediment and filtering and to reuse it to wash the toilet under the function of gravity .
钻井（水）龙头由于结构设计的原因，冲管盘根在钻井过程中不断磨损，特别是在高压泥浆的作用下，盘根密封常常被破坏。
The wash pipe packing of drilling swivel showed wear-and-tear continually in drilling process due to its structural design.
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