论文中详细叙述了设计的理论依据，介绍了可通信低压开关电器节点和监控PC节点的硬件设计和工作原理以及相关的软件程序设计思路和编制方法。
The principle and theory of our design is discussed chiefly. What is elaborated in the paper is the hardware and software design of intelligent relay and PC monitor node.
本文在讨论PD C钻头布齿设计特点的基础上，叙述利用CAD进行PD C钻头布齿设计的原理和方法，介绍PD C钻头布齿计算机辅助设计软件的内容和编制原理。
This paper narrates the principle and the way of the design for PDC bit placing by CAD, and introduces the contents and the elements of the Computer aided design.
从优化的原理、目标和方法出发，成功地编制了直廓环面蜗杆的优化设计程序，并对优化结果作了举例和比较。
Based optimization principle, object and method, the optimization design programme is worked out, illustrating and contrasting with the result.
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