Kuphulika kosakwanira: chifukwa mphamvu yosweka ya rivet yakhungu ndiyotsika kwambiri, rivet silinasunthidwe kotheratu, ndipo nsonga yosweka ya rivet yakhungu imachotsedwa, zomwe zimapangitsa kuti pakhale kusakwanira kwa rivet wakhungu.zimachitika pansi pa kulephera.
Nthawi yotumiza: Jul-28-2022