Arm mechanism body

FIG. 1 is a front elevational view of the arm mechanism body of the present invention showing our new design, the rear elevational view being a mirror image of the front elevational view;

FIG. 2 is a right-side elevational view thereof;

FIG. 3 is a left-side elevational view thereof;

FIG. 4 is a top plan view thereof,

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a perspective view thereof.

The broken lines shown in FIG. 6 represent portions of a hydrogen filling device including the arm mechanism body and form no part of the claimed design.