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Somewhere in the world, Children who go to school to learn knowledge, have to must tramp over hill and dale, Go through rushing streams or broken bridge. However they still have strong passion for knowledge, They can even walk to school at dark early morning,so they need a flashlight.The light is
shone on nearby sb. when his knees bent On the contrary,the vice versa is long distant .It has three advantages:1. Friction caused by walking can genevate electricity .2. In the early morning of mountain areas, kneepads can keep warm 3. The kneepads set hands free and reduce risks .
Zhejiang Gongshang University