Lishenflex dị ka ọkachamara na-emepụta eriri ratchet na onye na-ebubata ya na China, niile eriri ratchet agafeela ụkpụrụ asambodo ụlọ ọrụ mba ụwa, yana ị nwere ike ijide n'aka nke ọma. Ọ bụrụ na ịchọtaghị eriri ibu ibu Intent ratchet nke gị na ndepụta ngwaahịa anyị, ị nwekwara ike ịkpọtụrụ anyị, anyị nwere ike ịnye ọrụ ahaziri iche.