众所周知．矿业机械是发展煤炭、冶金、化工和能源等工业的装备和基础，其兴裹沉浮，对我国国民经济的重大影响是不言而喻的。然而．由于历史和其他方面的原因，矿业机械行业一直是机械工业中技术比较落后的一个部门。毋庸讳言，较长时期来，许多产品外观造型和色彩仍是数十年? We all know. Mining machinery is the equipment and foundation for the development of industries such as coal, metallurgy, chemical industry and energy. The rise and fall of mining industry and its great influence on our national economy are self-evident. however. Due to historical and other reasons, the mining machinery industry has been a relatively backward sector of the machinery industry. Needless to say, for a long time, many products appearance and color is still decades?