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目前世界汽车保有量达4亿9千多万辆。我国1985年民用汽车保有量已达321万多辆。为控制车辆的技术状况,保证车辆健康地运行,每年要耗费巨大的资金(见表1)。
At present, the world’s car ownership amounts to more than 490 million. China’s civilian car ownership in 1985 has reached more than 321 vehicles. In order to control the technical condition of the vehicle and to ensure the healthy operation of the vehicle, huge amounts of money are spent annually (Table 1).