The hold switch deactivates the buttons on the cassette holder.

HOLD开关可使卡带架上的钮键失效。

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Sample the negative voltage on the diode series with IGBT by Peak hold switch circuit, and cut-in A/D module in the DSP, compared with setting value.

通过电压峰值采样保持电路对IGBT串联二极管反压值进行采样，后经DSP A/D转换模块与反压设定值进行比较。

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Operators can also hold the switch down to run the flashlight in low mode, producing a 50 lumen light beam and a longer 12 hour runtime.

ENGADGET: Explosion-proof flashlight could be the first to outlive its owner

If someone calls you on your mobile number while you're on a Skype call, you can now put the Skype call on hold and switch between the calls.

ENGADGET: Skype for Windows Phone 8 official preview available now (video)

The Localism Act will require the 12 biggest cities in England to hold referenda to consider a switch to elected executive Mayors - the result could be a Boris-type figure in Birmingham, Bradford, Bristol, Coventry, Leeds, Liverpool, Manchester, Newcastle upon Tyne, Nottingham, Sheffield and Wakefield .

BBC: The mayoral future for England's great cities