开关

• The load current is handled directly by the controller through semiconductor switching devices .
  负荷电流由调节器通过半导体开关元件直接控制。
• The latter combination included series-parallel switching mechanisms which were troublesome .
  后一种联合使用的形式包括令人厌烦的串--并联的开关。
• A 0 bit or off switch is represented by the absence of any voltage on the conductor .
  当导线上电压消失时，就表示该位数字为“0”，即开关的“断”状态。
• The mechanical relays, which have been assumed in fig. 4-9, can be replaced by electronic switches .
  图4-9中使用的机械式继电器，可以用电子开关来代替。
• The factors of stress concentration in thin plates used as springs in electric switches were required .
  要求定出用作电器开关簧片的薄板中的应力集中系数。
• And the excitation voltage and output were also fed through the selector switch to the digital voltmeter .
  其激励电压和输出也通过选择开关接到数字电压表上。
• Each unit should include a main switch and ammeter with a scale of about 20 ampere capacity .
  每一套装置应包括一个主开关和电流表，电流表的刻度范围约20安培。
• The wearer of such glasses could change the focus by sliding a switch along one arm of the frame .
  带这种眼镜的人通过调整一只眼镜腿上的滑动开关可以改变焦距。
• In case a wrong recognition is made, the command can be cancelled by simply pressing the foot switch .
  万一发生识别错误，只要踩下脚踏开关，就可以使指令消除。
• The research on optical switches may lend to complete optical circuits on miniature circuit boards .
  对光学开关的这种研究，可能使我们把完整的光路制成微型的光路板。