... 's a welder used in workshop, which especially to make elbow,T-branch pipe, four-branch Pipe. ... It's a welder used in workshop, which especially to make elbow, T-branch pipe, four-branch Pipe. ... . The pressure regulating valve provides accurate pressure. The machine equipped with a timer, a voltmeter, a LCD ... and two elbow welding Slips were equipped with the machine. This set of Slips has all models as ...