Blackboard describes or represents four levels of reality, general graffiti, learning tools and Science Medicine

摘要

It refers to a blackboard or blackboard, which has two or three dimensions of motion. It draws, measures, interacts with computers, represents and promotes three-dimensional architecture. The blackboard or board has two actions: first, move a T-shaped ruler on the whole horizontal length or X-axis; second, move a tool car on the T-shaped ruler and travel around the whole vertical length, It is driven by two digital engines, which are respectively composed of mathematical functions of speed and acceleration, and operated by their controllers. These controllers are run from a software on a computer,It can be moved on the surface of the blackboard to describe the earrings and baffles