sentence: A man in welding attire welds a piece of metal to another piece of metal on camera. sentence:   A man wearing protective clothing and a metal welding hat stands in front of a piece of metal missing a long strip on the face of it. sentence:   The man begins to weld creating large sparks of white light. sentence:  When the welding stop the finished product reveals a strip has been welded onto the formerly bare spot and the welder tests it with a hard instrument.