| 单词 | electric main |
| 例句 | At the time, underground electric mains are required in new residential subdivisions in the Lower Peninsula, for certain industrial and commercial applications, in congested central business districts or at the utility’s choice. A roundup of recent Michigan newspaper editorials 2017-03-13T04:00:00Z There should be two electric mains entering all places of amusement, one from the front, with switchboard in box office, controlling entire auditorium and exits, and one on stage, to be used for theatrical purposes. Chicago's Awful Theater Horror 2012-03-28T02:00:25.877Z Edison, with copious ingenuity, devised electric meters, electric mains, lamp fittings and generators complete for the purpose. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2 "Ehud" to "Electroscope" 2011-01-29T03:00:23.777Z That is, a motor becomes a generator if belted to power; and a generator becomes a motor, if connected to electric mains. Electricity for the farm Light, heat and power by inexpensive methods from the water wheel or farm engine Suppose an insulated copper rod, which we may call an 'electric main,' to be laid down along one of our streets, say along the Strand. Fragments of science, V. 1-2 In a short time he returned with a tractor-like machine equipped with a small derrick, designed to get its power from the electric mains. The Black Star Passes Then the streets were being torn up to lay electric mains, and sand and cement blew about from half-finished concrete buildings. The Lure of the North The gas and electric mains were gone and the street lamps were all out. The San Francisco calamity by earthquake and fire |
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