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- Other systems
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- File Size:
- 29kb
- Update:
- 2017-12-15
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- Uploaded by:
- 李一好
Description: Edison invented a lot on people's lives today a dramatic effect on things, such as the phonograph, light, etc. , he is a well-deserved invention ki..
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| Filename | Size | Date |
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| 视频七：热电子效应，edison_effect.swf | 29700 | 2017-11-10 |
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