The essentials of descriptive geometry . Problem 285. Transition Piece A B C D E F G H a 12 4 8 4 6 12 6 6 b 12 4 8 4 6 12 3 6 c 12 4 8 4 6 8 4 3 d 12 4 8 4 6 12 3 3 e 12 4 8 4 4 12 6 10 194 ESSENTIALS OF DESCRIPTIVE GEOMETRY. Problem 286. Ventilator Cowl with Y-Connection and Square Hood A B C D E F G H K L 44 M 1818 N 446 0 X Y Z a 32 666 12 25 18 16 12 18 8 888 4S 45 105 b 32 12 26 18 16 12 18 8 60 45 105 c 36 12 30 14 18 10 12 12 6 18 60 60 105 MODEL MAKING 195

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