Wang Lin, a senior three student in Jiaozuo, Henan Province, spent three months making an electric compass under the guidance of his teacher because he was punctured by the tip of the compass when using it. The compass is an assembled structure, which can replace the gauge foot and pens of different colors without worrying about being pricked by the gauge. Students said it was very convenient to use.
Senior three boys invented electric compasses to draw automatically without hurting their hands. One
- How to preserve walnut kernel
- Was there an excessive serving of individual dishes in ancient China?
- What if there are small cockroaches at home? Common sense of rooting
- What does Sunglasses polarization mean
- What does qikuo mean in death and life
- How can lettuce be washed before it is eaten raw
- Harm of drinking corn whisker water for a long time
- What is the air density
- What is the meaning of the original order
- Five character dish name
- What does detention mean
- What is the difference between zero line and ground line
- Can sugar orange peel be soaked in water after drying
- Which city does Suqian belong to
- Fire dragon fruit can reduce fire or get angry