Kudziwa zoyambira za gudumu lopera kumathandizira ...
Magudumu akupera ndi mtundu wa ntchito yodula, ndi mtundu wa zida zodulira abrasive.Mu gudumu lopera, abrasive ali ndi ntchito yofanana ndi ma serrations mu tsamba la macheka.Koma mosiyana ndi mpeni wa macheka, womwe umakhala ndi ma serrations m'mphepete mwake, gudumu lopera limagawidwa mu ...