The rocker arm and drum of double drum shearer can be interchanged, and there is no difference between left and right.

Does the subject want to ask "can the rocker arm and drum of double drum shearer be interchanged without left and right points?" You can't. Double drum shearer is applied to comprehensive mechanized coal mining technology without cutting and feeding. The function of rocker arm and roller is different, although there is no distinction between left and right, but it can also be changed. Normal coal cutting is that the front drum cuts the top coal and the rear drum cuts the bottom coal.