... group line switch 区组预选器; 分组预选器 group switch 组开关 group switchboard 组交换台 ...
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特别是三相四线制有源电力滤波器硬件结构简单，只有三组开关器件。
Especially three-phase four-wire active power filter hardware has simple structure with only three group switch device.
第二组开关(7158型)在经过合适的平稳时间后将每个电容器连接到皮安计。
A second set of switches (on the Model 7158) connects each capacitor to the pico ammeter after a suitable soak period.
在该测试系统中，一组开关(7111 - S型或7169a型)被用来向每个电容器施加测试电压。
In this test system, one set of switches (on either the Model 7111-s or 7169a) is used to apply the test voltage to each capacitor.
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