sentence: Sandpapers come in various types.
sentences_before: Sandpaper' is a piece of paper with an abrasive glued to it.
sentences_after: Some are very rough, while others are very smooth. They are used to clean wood and metal and make them smooth. Some sandpaper is made to go on a machine that rubs very fast, while other sandpaper is used by hand.
concept_name: sandpaper
headings: Sandpaper
categories: Construction