Gear ea khale e behiloeng mabokoseng a marang-rang ka mechine ea ho phahamisa mechini ke karolo ea bohlokoa e netefatsang phetisetso e boreleli le e sebetsang. Moralo oa eona o ikhethileng o fokotsa lerata le ho lekanya, ho ntlafatsa ts'ebetso ea 'mele ka kakaretso. Boenjiniere ba gear ba tsamaisana le boenjiniere bo se nang kelello, bo fa matla a bolotsana. E loketse likopo tse fapaneng tsa ho jala le ho tšoarella, ho li etsa karolo ea bohlokoa ea mechine ea sejoale-joale.
Likhoele tse ka holimo ho le China Chaena, E na le basebetsi ba 1200, ba fumane mesebetsi e 31 ea 31 le li-patents tse 9. Ho fana ka mocheso, lisebelisoa tsa tlhahlobo.