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词汇 Trolley poles
分类 英语词汇 英语翻译词典
释义

Trolley poles

原声例句
大商业时代

In the minds of these men politics was necessarily as much a part of their business as trolley poles and steel rails.

在这些人的心目中,政治就像电杆和钢轨一样,必然是他们业务的一部分。

英语百科

Trolley pole

Trolley pole wheel on Twin City Rapid Transit Company No. 1300
Machining spare trolley pole wheels
Trolley retrievers on the back of a 1949 trolleybus
Toronto's CLRVs are equipped with trolley poles.

A trolley pole is a tapered cylindrical pole of wood or metal, used to transfer electricity from a "live" overhead wire to the control and the electric traction motors of a tram or trolley bus. It is a type of current collector. The use of overhead wire in a system of current collection is reputed to be the 1880 invention of Frank J. Sprague, while the first working trolley pole was developed and demonstrated by Charles Van Depoele, in autumn 1885.

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