call button

基本解释

Call-button C : press this button to send on CALL TONES.
呼叫按钮：按下这个按钮，以传送出电话口气。
To call in a nurse, he has to push a red emergency-call button from his bed. But where is the red button?
要叫来护士，他得从床上按一个红色紧急呼叫键。可是红色呼叫键呢？
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During a closing cycle, the release of the floor call push-button must release the Kc signal, insert the Ka signal and cancel the call.
在关门循环中，释放楼层呼叫按钮必须通过释放Kc信号，插入Ka信号，并取消呼叫进行。

People use a metal call box with a push-to-talk button to connect to a live operator, as Rose Shuman explains: "You just push a button, a big green button, and that will connect you directly to our operators who are sitting in front of computers, and speak your language.

For instance, an ad for a retailer with both physical stores and a website could include a click-to-call button or map for people searching from a smartphone or, for people searching from a computer, a link to the website.
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Push-button call boxes are being installed in 186 stores to make an associate appear within 60 seconds.
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One of the world's most conspicuously successful centres of enterprise lies in that bit of California known as Silicon Valley: computing is today's knowledge-based industry par excellence (see survey) The new jobs in tomorrow's industries, in manufacturing and services alike, will call for more than button-pressing automatons.
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