On the aspect of commercial vehicle production, the producing concentration of the enterprises reveals lower in general except heavy, medium duty trucks;

在商用车生产领域，除重型、中型载货汽车外，企业的生产集中度从总体来看相对较低；

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Allison transmission Division (ATD) is the world's largest producer of automatic transmissions for medium and heavy-duty trucks, buses and specialty vehicles.

艾里逊变速箱部是全球最大的中型和重型卡车、公共汽车与专业用车的自动变速箱生产商。

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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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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.

FORBES: Written by Jim Motavalli

While GM and Toyota expect sales to be relatively flat this year, at 17 million units (including medium and heavy duty trucks), Ghosn is worried that economic headwinds will lead to a substantial slowdown.

FORBES: A Downbeat Forecast From Nissan

In addition to medium and heavy-duty trucks and buses which are clearly used by businesses, commercial vehicle numbers in China include sales of light trucks and mini trucks and buses, many of which are used by individuals and small businesses.

FORBES: China's key economic indicator: auto sales