白银有色金属公司露天矿有两种大型矿用自卸汽车,一种叫玛斯525、另一种叫贝拉斯540汽车(以下简称贝拉斯汽车),都是从苏联进口的。贝拉斯汽车还被吹嘘为重型矿用自卸汽车的“王牌”。1970年以后,随着采场深度不断增加、线路坡度增大、运距增长和汽车车龄增加,贝拉斯汽车得了一种“发高烧”的病,就是每到夏秋两季汽车在重车爬坡时发动机冷却水 Silver non-ferrous metal company open pit mine has two large mining dump truck, a called Mas 525, the other called the Belas 540 cars (hereinafter referred to as the Belas car), are imported from the Soviet Union. Velasco has also been touted as the “trump card” for heavy duty dump trucks. After 1970, with the continuous increase of the stope, the increase of the gradient of the line, the increase of the transportation distance and the increase of the vehicle age, the Belas car got a “high fever” disease, that is, every summer and autumn, Heavy truck climbing engine cooling water