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1.can cut all kinds of metal which hardness under HRC70(include quenched steel ),and those nonmetal (marble,jade,bone).2.can instead of samll handle granding wheel  on most works,and no any dust pollution 3.high peoduction efficiency,10 times higher than manual file and samll handle grinding wheel .4.good quality processing,highly polishing,can work on all kinds of high-precision mould cavity .5.longer working lifetime ,on durability side ,ten times longer than high speed steel tools,200 times longer than alumina grinding wheel.6.Safe and easy using,can reduce workers' labour intensity and imp