The vacuum load switch unit is fixedly sealed and isolated by adopting epoxy resin.

真空负荷开关单元采用环氧树脂固封绝缘。

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The antenna switch unit is selectively coupled to the first antenna or the second antenna.

天线切换单元选择性地耦接于第一天线或第二 天线。

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The experimental results of model motor proves that IGBT is an ideal switch unit of the switched reluctance motor.

样机实验结果验证IGBT是开关磁阻电动机理想的开关元件。

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There is no need to use the push button on the side of the PTV3000 unit to switch between Widi and Miracast modes.

ENGADGET: Netgear PTV3000 updated, supports Miracast-ready Android devices

In order to fully exploit the sound potential of the HDVD 800 with any audio source, a rotary gain switch at the rear of the unit provides simple adaptation of the amplifier output to the audio input voltage.

ENGADGET: Sennheiser unveils HDVA 600 analog headphone amp, asks for $1,600

Running an AC unit without a low-pressure cutoff switch when it's colder than about 60 degrees might damage it, says Troy Gregory, president of Standard Heating and Air Conditioning.

WSJ: Don't Wait to Service AC Units