一贯密切注视世界大型露天采矿公司需要的卡特彼勒公司(美国)宣布推出了一种居于该公司越野汽车之冠的汽车——789型。 789型汽车的额定载重170短吨(155t),最大容许载重195短吨(177t),它打破了最大型矿用汽车应用电力驱动方式的传统观念。卡特彼勒公司声称:对于同一规格的汽车,使用机械传动的运输效率要比电力传动的高15～25％,而运营费用却可减少同样的数额。 Caterpillar, Inc. (USA), which has always closely watched the needs of the world’s large open-air mining companies, announces the launch of the 780, the car owned by the company’s off-road vehicle. Rated at 170t (155t) and 195ft (177t) maximum allowable, the Model 789 breaks the traditional notion of electric drive for the largest mining vehicles. Caterpillar claims that with a car of the same specification, the use of mechanical transmission can transport 15-25% more efficiently than electric drives, while operating expenses can be reduced by the same amount.