Eastablished nyob rau hauv 1984 los ntawm Suav Academy ntawm Sciences.38 xyoo ntawm resin-bonded abrasive log tsim kev paub.
OEM cov khoom tau raug xa mus rau 130 lub teb chaws.Robtec cov khoom lag luam tau muab faib rau ntau dua 36 lub teb chaws.
J Long twb muaj ntau tshaj 300 tus neeg ua haujlwm.
Ntau lawm muaj peev xwm ntawm J Ntev mus txog 500,000pcs ib hnub twg.