A robotic arm, according to wikipedia, is a type of mechanical arm, usually programmable, with similar functions to a human arm; the arm may be the sum total of the mechanism or may be part of a more complex robot. The links of such a manipulator are connected by joints allowing either rotational motion (such as in an articulated robot) or translational (linear) displacement. The links of the manipulator can be considered to form a kinematic chain. The terminus of the kinematic chain of the manipulator is called the end effector and it is analogous to the human hand.
Robotic arms RUNMA manufactures and supplies are used in assembly lines or production lines to take out the components of products to be assembled, and place and fit them in the right place. Most of the robot arms are used to take out the finished products from injection molding machines. For example, in a production line of toys, after the toys have been injected, take-out robotic arms take out the finished products after receiving a signal. And then they put the toys on the conveyor belt, let them flow to the working area, there will be staff are prepare to pack it up, complete the whole production line. Whether the functions can be performed by a manipulator depends on the reach of its end fixture, the orientation in which it can work and the overall working space for a manipulator is determined by the structure of the body of the manipulator.