1.3 GROUP C: Horizontal rectangle with horizontal lines in side panels.1.2 GROUP B: Horizontal frank convex at top and bottom, concave at sides.1.1 GROUP A: Early experimental designs.
1.3 GROUP C: Horizontal rectangle with horizontal lines in side panels.1.2 GROUP B: Horizontal frank convex at top and bottom, concave at sides.1.1 GROUP A: Early experimental designs.
