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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Described are the main usage, technical parameters, structure and application of the tank car for dense phase conveyed aluminum oxide powder.

介绍了浓相输送氧化铝粉罐车的主要用途、技术参数、结构及应用情况。

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Main usage: the product is mainly used in manufacture of the battery electrode plates, the hard gold, printing alloy, cable sets and the bearing alloys, etc.

主要用途：制造蓄电池电极板、硬金、印刷合金、电缆套管及轴承合金等。

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Writing in Slate, Microsoft's online magazine, Mr Myhrvold explains that the main problem with usage-based charging for electronic information is that it is an artificial distortion of the underlying economics.

ECONOMIST: So many ways to pay online

Appliance usage may be a main effect variable in epidemiologic studies of health impacts of electromagnetic fields.

FORBES: The Truth About Risks, Benefits of the Smart Grid

"All the routes that were reduced have been checked and found to be under the degree of usage and priority that we would require for a main priority road, " he said.

BBC: Gritter