Retainer for Circuit Substrate Conveyance

FIG. 1 is a bottom perspective view of a retainer for circuit substrate conveyance, showing my new design; FIG. 2 is a top view thereof; FIG. 3 is a bottom view thereof; FIG. 4 is a front view thereof, the back view being a mirror image; FIG. 5 is a left side view thereof; and, FIG. 6 is a right side view thereof. The broken lines shown in the drawings represent portions of the retainer for circuit substrate conveyance that form no part of the claimed design. The back view is omitted because it is a mirror image of the front view.