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图形钉板文李振用途巩固对几何图形的认识。准备材料１块边长为２０厘米的正方形木板，厚度为２厘米；２厘米长的小铁钉６４个；与小铁钉同粗的塑料管１根（长１．３米）；橡皮筋２个～４个。制作方法１．将木板用砂纸磨光，涂上油漆。在木板面上钉上小铁钉，共８排，每排...
Graphic nail plate Li Zhen Use to consolidate the understanding of geometric figures. Prepare a square piece of wood with a side length of 20 cm and a thickness of 2 cm; 64 small nails of 2 cm in length; 1 plastic tube (1.3 m) thick with a small nails; rubber band 2 A ~ 4. Production method 1. The board polished with sandpaper, painted with paint. Nail in the wood nails, a total of 8 rows, each row ...