Modular Speed Reducer

FIG. 1 is a perspective view of a modular speed reducer showing my new design; FIG. 2 is a top view thereof; FIG. 3 is a front view thereof; FIG. 4 is a rear view thereof; FIG. 5 is a right side view thereof; FIG. 6 is a left side view thereof; FIG. 7 is a perspective view thereof in a use context; and, FIG. 8 is a top view thereof in a use context. The bottom view is omitted and forms no part of the claimed design. The broken lines depict structure or features which form no part of the claimed design.