Sehlopha sa R ​​& D

Interlocking & Friction Kelly Bar Kelly Bar e felletseng ea Kelly Kelly Bar bakeng sa sebaka se tlase sa ho sebetsa Lisebelisoa tsa mantlha Ho lokisa lisebelisoa Bucket Li-casis tsa Bohrrohre Swivel Roala likarolo bakeng sa lisebelisoa tsa ho cheka

Superpower Tloaelo ea Khoebo R & D Nchafatso Sehlopha sa R ​​& D Lisebelisoa tse bohlale Boikarabello ba Sechaba Matlotla a Khampanisang Nalane ea Nts'etsopele

Mefuta ea Kelly Bar Mefuta le Kopano Ts'ebeliso ea Kelly Bar Tlhokomelo ea Kelly Bar Ho batle phoso Litlhokomelo tsa Banna o Kelly Boikarabello bo sa na thuso ho cheka tšobotsi ea Rig kapa Kelly Bar Litaelo tsa tšebeliso ea litlolo le tlhokomelo Khetho ea Hlooho ea Square Lintho tsa video Khoasolla file

Litaba / Blog Iteanye le rona Mecha ea litaba ea sechaba