With a set of buttons and a loud bell, the device, sold by National Cash Register (NCR), was little more than a simple adding machine.

全国现金出纳机公司卖给他的这套装置有一组按钮和一个很响的铃铛，也就一个加法机那么简单。

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Each indoor fire alarm push-buttons shall be equipped with a break-glass push-button and an alarm bell.

每个室内火警按钮都应有一个？？按钮和一个警铃。

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