The two sides announce the expansion of cooperative research and development under CERC by launching a new technical track to improve the energy efficiency of medium-duty to heavy-duty trucks.

双方宣布扩大中美清洁能源联合研究中心研究与开发合作，新启动一个提高中载至重载卡车能源效率的技术合作领域。

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Taking a medium-duty electric bus as an example, the whole computation parameters of the air-conditioning system were given.

以某型号纯电动中型客车为例， 给出了完整的空调系统计算参数。

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The barometric brake system is the most familiar power servo brake system. It iscommonly used in the medium-duty truck and heavy truck.

气压动力制动是最常见的动力制动系统，多用于中重型汽车。

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Its main business is Guangxi Yuchai Machinery Company, which is one of the largest medium-duty diesel engine manufacturers in China.

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The company says there are 33 million light- and medium-duty trucks on the road, and converting them to plug-in hybrid results in an 80 to 200 percent fuel economy improvement.

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Unlike the light-duty vehicle market, most medium- and heavy-duty truck purchasers operate on slim profit margins where fuel costs are a major factor in their economic survival.

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