为了找到问题答案，我们选择太原机车车辆厂作为试点。
In order to find the answer to the question, we choose the rolling stock plant of Taiyuan as the pilot project.
介绍了由唐山机车车辆厂自行研制开发的国内首列双层内燃动车组。
The first double deck diesel multiple unit in China has been developed inhouse by Tangshan Locomotive and Rolling Stock Works.
大连机车车辆厂研制的东风4D系列内燃机车，是以240/275ZJD系列柴油机为动力的一组机车的统称。
DF4D series Diesel Locomotives designed and manufactured by Dalian Locomotive Works, are a group of locomotives that utilize 240/275ZJD series diesel engines.
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