The authors introduce the structure and operating principle of a new type long stroke pumping unit on which the walking beam is in combination with a planetary transmission (called "combined unit" for short),analyze the force condition of the rotatable horse head on the combined unit, the reliable operation of the stroke-increment mechanism and its manufacturing cost and energy consumption.
The structure and operating principle of series of traveling-wave type, cylindrical bending vibration type, new stepping type and multi-degree type ultrasonic motors have been described. Their application foreground in precise register control system, car electric appliances and aerospace field etc.
The structure and operating principle of a testing and automatic mixing system of the emulation concentration are introduced in this paper. And microcomputer control technology is adopted in the system. The control center of this system is 8031 singlechip.
In this paper,the structure and operating principle of this type of corn-harvester are introduced. Also the characteristics of main working parts and the methods to determine the main parameters are elaborated.
In this article,its general circuit structure and operating principle are introduced and analyzed and its compensation performance in 10 Gbit/s optical transmission systems verified by the system tests and the analysis of the test results.
The structure and operating principle of a system for determining the limits of oil-bearing strata by the pulsed neutron-gamma and oxygen activation logging method are considered.
The structure and operating principle of micro valveless pump were investigated theoretically and experimentally.
The writer of the paper designed the electrical control system Of narrow slit type of multiple-set high speed cameras under a condition of the combined operation. With the help of technicians of Li-Shan Micro Electronics Corporation, this system has been satisfactorily manufactured and put into use. The paper mainly deals with the structure and operating principle of this system.
In this paper the features,structure and operating principles of a two-st-
介绍了 JH 单轴长料挂车双级断气制动系的特点、结构与工作原理。
This paper proposes a powerful software for microcomputer communication, RCS.RCS is provided with more than eighty functions including the main namely performances of mierocouputer communication software used at the presen time. Moreover, it implements its automatic transmission by use of one-to-many transmission technique. The internal structure and operating principle of RCS are described in detail in this paper.