Another version of the inch is also believed to have been derived from the width of a human thumb, where the length was obtained from averaging the width of three thumbs: a small, a medium, and a large one.Uluslararas? Kullan?m: ISO standartlar?na ??k olmalar?, bu vidalar?n dünya genelinde kolayl?kla bulunabilir ve kullan?labilir olmas?n? sa?lamla