two-stage design

However these two methods cost too much, and usually need along test cycle, which can not adapt to the requirements of modern ship design.

然而，这两种方法的成本比较高，需要耗费很大的人力物力，而且通常试验周期比较长，不能够适应现代舰船设计研究的要求。

The structural and hydraulic design method is presented low-specific-speed highspeed centrifugal pump with two-stage complex impeller.

阐述了两级复合叶轮高速泵的结构设计特点和水力设计方法.

The design and operation of a two-stage UASB-aerobic oxidation process to treat citric acid wastewater were described.

介绍了采用两级UASB好氧工艺处理柠檬酸废水工程的设计、调试和运行情况。

The implication of the findings is the provision of the level of service evaluation and the test and determination of the criteria of geometric design for two lane rural roads.

研究结果可用于评价两车道公路的服务水平及检验和建立二车道公路的几何设计标准。

From its two basic functions, namely temporary supporting and underground water sealing, the design principle and method of frozen walls were discussed.

从临时支护和止水两个基本作用出发，探讨了冻土墙的力学设计原理和方法。

Then introduce the structure and design of terminal management module and the call control module which are the two most important modules of the system.

对其中最重要的两个模块终端管理模块和通话控制模块的结构和设计做了重点介绍，接着分析了每个模块的结构，讨论了每个模块的线程设计和消息机制，并给出了实现举例。

It happened ─ whether by accident or design ─ that the two of them were left alone after all the others had gone.

碰巧——不知是偶然还是有意安排——其他人走后，只剩下了他们两个人。