3D printers; 3D printing pens; Servo-motors; Belt pulleys being parts of machines; Brushes being parts of or for use with machine; Electric motors, and their parts, not for land vehicles; Extrusion machines for plastic; Fans for motors and engines; Industrial robots; Machine parts, namely, bearings; Machine parts, namely, gear drives; Machine parts, namely, joints and joint parts for connecting sliding strips, plates and guides; Servo motors; Shaft couplings as parts of machines; Three dimens...