The paper introduced a method that can locate the position of cable breaking point by using the reflection of low pressure impulse, and set up a control system through 89c52.
介绍了一种利用低压脉冲反射法测定电缆断点位置的方法，并采用89c52单片机建立了控制系统。
Under the assumptation that the "Pressure Zero Temperature Point" exists, with the corresponding state method, a new vapor pressure equation was established in this thesis.
在假设存在“压力零点温度”的概念基础上，运用对比态的方法，本文提出了一个新的饱和蒸气压方程。
Analyse choice method of collision point of cylinder and shovel head and confirm initial pressure and volume of nitrogen chamber.
分析了活塞杆与铲头碰撞点的选择方法和氮气室的初始压力和初始容积的确定方法。
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