Lithapo tsa ratchet tsa marulelo ke moqapi o mocha, ka theknoloji e babatsehang ea ho sebetsa le lisebelisoa tse tala tsa boleng bo phahameng, ts'ebetso ea marapo a marulelo a marang-rang a fihla boemong bo phahameng. Re phethahetse bakeng sa lintlha tsohle tsa marulelo a marulelo a marang-rang a marang-rang , re tiisa boemo ba boleng, e le ho u tlisetsa phihlelo e phethahetseng ea sehlahisoa. Lishenflex ke setsebi sa China se etsang marang-rang a marang-rang moetsi le mofani oa thepa, haeba u batla marapo a marang-rang a marang-rang a marang-rang ka theko e tlase, ikopanye le rona hona joale!