题目内容
The special equipment of the subway line includes track equipment, including mainly steel track, contact rail, _______,________, ___________and connecting parts, all of which together consititute the ________of the operation of subway trains.
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Switch equipment is used for the operating line and the _________ and railroad _________ at the train garage.
Switch equipment includes ________(单开），____________（交叉渡线） and compound crossing and division.
The power supply system adopts the mode of providing _________ at voltage ________ and with contack rail (the third rail) receiving electricity.
The _____ and sleeper are the foundation of the steel track. The sleeper is divided into _____ sleeper and ______ sleeper.
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