Acute pancreatitis is usually caused by a gallstone getting stuck in the bile duct on its way from the gallbladder into the small intestine. Since the bile duct shares the same opening with the pancreatic duct, a sudden obstruction of the pancreatic opening will cause pancreatic juices to back up into the pancreas.
A welder or welder operator is a tradesperson who specializes in welding materials together. The term welder refers to the operator, the machine is referred to as the welding power supply. The materials to be joined can be metals (such as steel, aluminum, brass, stainless steel etc.) or varieties of plastic or polymer.his article is about welding as a trade. For the machine used to power arc welding procedures, see Welding power supply. For the album by Elizabeth Cook, see Welder (album) .
Simply, welding is a way to make high strength joints between two or more parts. There are many ways to do this and these require a high degree of skill and advanced technology.Welders work with a lot of different metals, alloys and materials â heating, melting and joining these âcompositesâ together.imply, welding is a way to make high strength joints between two or more parts. There are many ways to do this and these require a high degree of skill and advanced technology.