国产精品永久免费视频- 无码精品A∨在线观看中文 -热re99久久精品国产99热-国产成人久久777777

A staff member works in a workshop of Motor Technologies (Beijing) Co, July 16. New energy vehicles may well save the environment and accordingly, a major breakthrough is at hand in the development of a new bus power system for a domestic automaker. The company, known as Motor Technologies, is based in the Beijing Economic & Technological Development Area and is recognized as a high-tech operation offering expertise in R&D, production and sales of core components for new energy vehicles. [Photo/kfqgw.beijing.gov.cn]