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。
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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