Na li-rivets tsa li-countersunk head li hloka masoba a li-countersunk?

Pele u sebelisa e bulehileng countersunk hlooho hula rivet, ho ke ke ho hlokahala hore ho etsa countersunk lesoba holim'a poleiti pele, ho seng joalo ho tla ba bonolo ho se leka-lekane ka mor'a riveting.