used buses (eg. Benz, VOLVO B10M/B7, JAPAN UD, K-SETRA S215, MAN6120, YUTONG SERIES BUSES, China King-Long, HYUNDA6900, DEAWOO, NEOPLAN, etc. series used buses) and refractory materials which are widely used in metallurgical(冶金) industries, the cement kiln, the glass industries and the other industries