Prompt: Draw an oil-water separator behind the wall of an office building. The oil-water separator is a rectangular parallelepiped structure, made of 304 stainless steel. The pipes enter the oil-water separator after coming out of the office building. The oil-water separator treats the sewage in the office building pipes. It is drained into the sewer. It is created using realistic techniques. The front view mainly shows the oil-water separator. The office building only shows the wall with the drainage pipe.