kẹkẹ & Castor Itọsọna Ni ṣoki alaye: Imọ ipilẹ ati awọn ofin imọ-ẹrọ nipa awọn kẹkẹ & castors. ●Bii o ṣe le yan castor to dara ● Bii o ṣe le yan dimu simẹnti to dara ● Fttings ti castor ● 5 Italolobo fun Nto swivel castor ● Gbogbogbo ilana fun lilo castors ● Bawo ni lati ṣetọju aga castors
