"paint roller"的定义和意义

What is a "paint roller"?

A paint roller is a tool used to apply paint quickly and evenly over large, flat surfaces like walls and ceilings. It includes a handle attached to a rotating cylinder covered with a foam or fabric material that soaks up the paint. When rolled over the surface, it spreads the paint smoothly, making the job faster and easier compared to using a brush. Paint rollers come in various sizes and textures to suit different types of paint and surfaces.