Double sided milling machine, also known as CNC milling machine or machining machine. Mainly composed of bed frame, saddle, worktable, column, headboard box, etc., without any motors, electrical appliances, or peripheral sheet metal parts, the main unit is assembled, inspected, and painted according to the semi standard in China. The main products include linear guide machining machines, dovetail guide machining machines, and rectangular sliding guide machining machines.