sentence: A man holds a welding device and adjusts it while showing his work area. sentence:  The welder is held over a steel plate and moved slowly. sentence:  The man pulls the welder over a copper colored piece of metal. sentence:  The man puts down his face guard and welds a spot on a piece of metal. sentence:  The man stops for a break. sentence:  The man welds a line into a piece of material. sentence:  The man holds up a hammer chisel over the bar of metal and chips off some pieces. sentence:  the man uses a wire brush to clean the metal.