... specializes in producing and exporting various kinds coal cutters, coal picks, coal cutter picks, coal bits, coal drill bits. They are widely used on ... with Wirtgen system and Kennametal systems.2.They are used for road milling,ground stabilizing,cutting asphalt and road,etc. ... the machining process is forged5.applicable to all kinds of coal wining machine,roadheader,etc.;6.various design can be ...