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The China Railways DFH1 was a type of 4 axle B'B' single cab diesel hydraulic locomotive used on mainline passenger services, the DFH3 was a later development of a similar design but with two driving cabs. The China Railways DFH4 was a 6 axle high powered freight and passenger locomotive, it did not reach mass production. ==China Railways DFH1== The first prototype unit (NY1) (''neiran yeli chuandong'' meaning diesel hydraulic transmission)〔(ND and NY prefixes ) , ''www.railwaysofchina.com''〕 was produced in 1959 at Sifang locomotive works, and given the name 'Weixing'. Locomotive design was similar to German diesel hydraulic machines such as the DB Class V 200 - the machine had a pair of high speed diesel engines each driving a separate hydraulic torque converter based transmission resulting in low mass compared to contemporary diesel electric machines. Series production began in 1964. The locomotive was used for passenger trains.〔 The locomotives could be worked in multiple, and were often used in this way, with a cab at each end. They operated on the Beijing Shenyang passenger trains.〔(DFH1 Class B'-B' Diesel-Hydraulics ) , ''www.railography.co.uk''〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「China Railways DFH mainline locomotives」の詳細全文を読む スポンサード リンク
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