... ,Tunnelling,Recycling, For estmulching,Railtrackconstruction,Road planing,Reclaiming and Hardware tool.Process:According to the customersdrawings or samples ... In addition ,we have the expertise creat and produce machining fixtures and gauges for secondary operations or inspection if ... Heat treatment the whole parts in belt furnaces, quenched in oil and tempered to make sure the tooth body hardness is ...