Reduction gear

FIG. 1 is a first perspective view of a reduction gear;

FIG. 2 is a second perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof, the opposite side being a mirror image of the side shown herein;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines depict portions of the reduction gear in which the design is embodied that are not considered part of the claimed design.