E thehiloe ka 1984 ke Chinese Academy of Sciences.Lilemo tse 38 tsa boiphihlelo ba ho etsa mabili a abrasive a resin.
Lihlahisoa tsa OEM li abetsoe linaha tse 130.Lihlahisoa tsa mofuta oa Robtec li phatlalalitsoe linaheng tse fetang 36.
J Long o ne a se a ntse a e-na le basebetsi ba fetang 300.
Bokhoni ba tlhahiso ea J Long bo fihlile ho 500,000pcs ka letsatsi.