1 A - x1 C- x1 G - x4 I - x1 B - x1 F- x1 H - x1 J - x1 K - x4 N1 - x1 L - x4 E - x1 N2 - x1 L K D- x1 L M- x1 N3 - x1 4 3 ?2 5 N3 J D N3 A E 10° H F N2 G D ? N1-3 N2 5° 75mm x 75mm C D N1 D W N1 H D G I B 100mm x 100mm