提出了缺相和错相电路保护方案的设计，并分析其工作原理。
The article describes the design of phase lack and phase dislocation protection circuits and analyzes the operation concept.
利用耦合波方程理论分析其工作原理，计算机模拟其耦合过程。
The working principle is theoretically analyzed by the coupling wave equation and the coupling procedure is simulated by the computer.
参数错误是监护仪的常见故障，分析其工作原理并说明维修流程。
The parameter fault of theSpacelabs1050patient monitor is a frequently trouble. From its working principle, the paper explains the process of analysis and elimination of the trouble.
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