In this paper the general working principles of pneumatic seed-metering device was analysed by tne principle of fluid mechanics.
本文运用流体力学的基本原理，对气吹式排种器的工作情况进行了分析。
In this paper, the general drying process and the working principles of heat pump dryer are discussed, and the design of a set of heat pump drying equipment is described.
本课题根据热泵干燥机的工作原理以及对干燥过程的研究，自行设计并组装了一套热泵干燥装置。
This paper presents the general layout and working principles of NPQ-86 test bed controlled by microcomputers for determining the starter performance.
介绍了用微机控制的NPQ- 86型启动机性能试验台的总体布置和工作原理。
The main compositions, mounting mode, working principles and characteristics of the EP2002 brake control system are introduced and compared with general braking control system.
介绍EP2002制动控制系统的主要组成部件、安装方式、作用原理及特点，并与常规制动控制系统进行了比较。
Scientists working in this field have discovered general principles of the perception of forms.
这个领域中的科学家发现了形式感知普遍规律。
Secondly, the history and features of soft PLC are also introduced, and by means of analyzing the working principles, the general architecture of the system are put forwarded.
其次简介了软逻辑控制技术的产生、特点及其工作原理，提出了软逻辑控制系统的总体设计方案。
Secondly, the history and features of soft PLC are also introduced, and by means of analyzing the working principles, the general architecture of the system are put forwarded.
其次简介了软逻辑控制技术的产生、特点及其工作原理，提出了软逻辑控制系统的总体设计方案。
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