Osis on sageli ühest materjalist valmistatud detail, mida töödeldakse soovitud kuju saamiseks (näiteks ehitusplokid). Osis on tavaliselt suhteliselt jäigast materjalist tükk, nt puidust, metallist, plastist või kivist tükk.
A workpiece is a piece, often made of a single material, that is being processed into another desired shape (such as building blocks). The workpiece is usually a piece of relatively rigid material such as wood, metal, plastic, or stone.
