Inakhazikitsidwa mu 1984 ndi Chinese Academy of Sciences.Zaka 38 zopanga ma wheel abrasive opangidwa ndi resin.
Zogulitsa za OEM zagawidwa kumayiko 130.Zogulitsa zamtundu wa Robtec zagawidwa kumayiko opitilira 36.
J Long anali kale ndi antchito oposa 300.
Kuthekera kwa J Long kudafikira 500,000pcs patsiku.