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81. | innovate a design |
| 发明一种设计 |
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82. | first to invent system |
| 先发明制 |
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83. | working of an invention |
| 发明的实施 |
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84. | invent a torture |
| 发明一种刑具 |
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85. | invention of improvement |
| 改进性发明 |
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86. | Necessity be the mother of Invention . |
| 需要发明之母。 |
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87. | characteristic feature of inventio |
| 发明的特点 |
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88. | unaccomplished invention |
| 未完成的发明 |
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89. | nature of invention |
| 发明的性质 |
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90. | an original invention |
| 新的发明 |
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