... deprecistion 折旧 depressed center flat car 凹底平车；元宝车 depressed center waggon 中央部位凹底的大货车 ...
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t depressed center flat car t凹底平车
d depressed center flat car d11型凹底平车
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The utility model also provides a railway depressed center flat car.
本实用新型还提供了一种铁路凹 底平车。
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Described are the development process, main usage, technical parameters, main structure and testing of the D28 depressed center flat car.
介绍了D 28型凹底平车的研制过程、主要用途、技术参数、主要结构及试验情况等。
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