Its main return circuit adopts thyristor contactless switch, so can turn off circuit quickly, precisely and reliably.
该系列点焊机主回路均采用晶闸管无触点开关，电路关断时间快、准确、可靠。
A practicable transistor on-off circuit is presented which can measure capacitance and dielectric constant accurately.
介绍一个实用的晶体管开关电路，用它能够较准确地测定电容和介电常量。
The shortcomings of them are analysed and an automatic current backing off circuit with high accuracy is described in this paper.
本文分析了这两种方法的缺点，给出了一种测量精度高的电流自动补偿电路。
The aim and scheme for optimum design of the off-circuit tap-changer the method to simplify structure and the way to improve reliability are expounded.
阐明了无励磁分接开关优化设计的目标和方案、简化结构的办法及提高可靠性的途径。
The aim and scheme for optimum design of the off-circuit tap-changer the method to simplify structure and the way to improve reliability are expounded.
阐明了无励磁分接开关优化设计的目标和方案、简化结构的办法及提高可靠性的途径。
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