Do I have to have original parts to open sw engineering drawings?

Parts are the basic elements of a machine. A machine generally includes one or several prime movers (such as motors, internal combustion engines and steam engines) that receive external energy, executive parts (such as tools in machine tools) that realize the production function of the machine, and transmission parts (such as gears and screw transmission mechanisms in machine tools) that transmit the motion and power of the prime movers to the executive parts.

Detection and control system (such as numerical control system in machine tool) to ensure the coordinated work of all parts of the machine (that is, the machine consists of prime mover, transmission part, execution part and measurement and control part). By further decomposing the machine, various parts can be obtained.