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一、教具的制法: 磁性黑板的制法:用0.5毫米的铁皮100cm×80cm两块,小磁铁20个,3cm宽的木板条或纤维板条4m,0.5mm厚10cm宽的铁皮条4m,铆钉40个。制作时,先将小磁铁均匀地排布在两块铁皮的中间。两张铁皮的中间四周,用木板条或纤维板条垫平,外面再用10cm宽的铁皮包好,用铆钉铆在一起,用黑色瓷漆漆成黑色即成。用12号铁丝做成下列各种仪器的平面图武,再用调合添油成各种鲜艳美观的颜色。
First, the teaching methods: Magnetic blackboard method: Use 0.5 mm metal sheet 100cm × 80cm two pieces, 20 small magnets, 3cm wide wood strips or fiber slats 4m, 0.5mm thick 10cm wide iron strip 4m, rivets 40. At the time of production, small magnets were evenly arranged in the middle of two sheets of iron. Around the middle of the two iron sheets, they are flattened with wooden slats or fiber slats. The outside is then covered with a 10 cm wide iron sheet, riveted together with rivets and painted black with black enamel. We use the 12th iron wire to make a plan of the following various instruments, and then mix and match the oil into various bright and beautiful colors.