Chothandizira pa Katundu, chimagwiritsidwa ntchito makamaka pokonza ndi kutsekereza katundu mkati mwa ma van a ziwiya.
Kapangidwe kake ndi kosavuta, ntchito yake ndi yosavuta, ndipo ntchito yake ndi yokhazikika.
zitha kuchitika nthawi yomweyo, zomwe zingapulumutse nthawi ndi khama
* Mtundu wosinthika wautali kwambiri wa ntchito zosiyanasiyana * Ratchet structure rabara pad, kapangidwe kosatsetsereka, kuchepetsa kugwedezeka * Chogwirira chosinthika chotseka, malo okhazikika