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俄罗斯一家电子工厂已开始成批生产一种电子仪器——火车临近预报仪。以前,铁道养路工人在修理铁道或清道时,必须派人专门观察有无火车开来,该仪器在火车快来时,能发出很强的声音信号,在晚上则亮起信号灯。另外,它还具有如下功能:当养路工使用气动扫雪机清除铁道积雪时,火车临近预报仪在火车临近时还能自动地使扫雪机停止工作,便于养路工人及时知道火车的到来。
An electronic factory in Russia has begun mass production of an electronic instrument - the train is near the forecaster. In the past, when railway maintenance workers repaired railways or lanes, they had to send people to observe the presence or absence of trains. When the trains came, the instrument could make a strong sound signal and at night turn on the signal lights. In addition, it also has the following functions: When the road builders use the pneumatic snow plow to clear the railway snow, the train near the forecaster can also automatically stop the snow plow when the train approaches, so that the road maintenance workers can know the arrival of the train promptly.