Because of the First World War, Wegener's book went unnoticed outside Germany. In 1922, however, a third (revised) edition was translated into English, French, Russian, Spanish, and Swedish, pushing Wegener's theory of continental drift to the forefront of debate in the Earth sciences.
A drilling machine, called a drill press, is used to cut holes into or through metal, wood, or other materials (Figure 4-1). Drilling machines use a drilling tool that has cutting edges at its point.
A press brake is a machine used for metal plate bending. It has a frame, bed, ram, and drive. Press brakes are designed to deliver accurate vertical blows. The integral parts of a press brake includes the housing, brake, bolster plate, bed, ram, gibs, and drive. Main parts.