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国家“七五”期间科技攻关项目之一的25.5m空调双层客车,经过浦镇车辆工厂一年多时间的努力,于七月下旬研制成功。该车每辆定员186人,比目前运用的YZ22型车硬席座车增加载客68人,设计构造速度120km/h,主要适用于中、短途旅客运输。列为国家“七五”科技攻关项目的25.5m空调双层旅客列车,于1985年由浦镇车辆工厂中标承制,1986年初开始设计;1987年6月首辆样车落成,年内试制10辆;1988年完成整列样车共20辆的试制,其中包括硬席座车16辆、软席座车3辆和发电车1辆。软、硬席座车车
The 25.5m air-conditioned double-decker bus, one of the key scientific and technological projects during the “Seventh Five-Year Plan” period, was successfully developed in late July after more than a year’s hard work by Puzhen Vehicle Factory. The car capacity of 186 people per vehicle, than the current use of YZ22 car seat seats to increase the carrying capacity of 68 passengers, the design speed of 120km / h, mainly for medium and short-distance passenger transport. The 25.5m air-conditioned double-decker passenger train, listed as the national “Seventh Five-Year” scientific and technological project, was awarded the bid by Puzhen Vehicle Factory in 1985 and started to be designed in early 1986. The first prototype vehicle was completed in June 1987 and the trial production of 10 In 1988, a total of 20 prototypes of the entire sample vehicle were completed, including 16 hard seat seats, 3 soft seat seats and 1 power station. Soft, hard seat car