Mini Robot Arm 4 Axis 3kgs Palletzing Robotic Arm with CNC Robot Controller Systems with Servo Motor and Driver - China Robot Arm, Robotic Arms | Made-in-China.com
4-Axis 4-DOF Robot Arm Industrial Mechanical Arm + 3pcs 57 Gear Motors 2.5kg New | eBay
Wholesale Reliable Supplier Vertical Articulated Robot - Stable 4 Axis Palletizing Industrial Robot Arm For Loading And Unloading – Newker Manufacturer and Supplier | Newker
4-axis Robot Arm Kit:myPalletizer 4-DoF collaborative robot from Elephant Robotics
Less Than 4 Axis? Don't Forget About Cartesian Robots | Pneumatics Today
Peer-review under Responsibility of Daaam International Vienna 25th Daaam International Symposium on Intelligent Manufacturing and Automation, Daaam 2014 New Concept for Design and Control of 4 Axis Robot Using the Additive Manufacturing