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71. | selective call with dual voice frequency |
| 双音频选叫 |
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72. | Wit and Humor from Old Cathay |
| 历代笑话选 |
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73. | water-base winnowing |
| 水基漂选 |
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74. | second selector |
| 第二级选择机 |
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75. | jig concentration |
| 跳汰机选别 |
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76. | Selected Plays of Guan Hanqing |
| 关汉卿杂剧选 |
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77. | Chinese Ancient Fables |
| 中国古代寓言选 |
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78. | selective impulse |
| 选通脉冲 |
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79. | station selector |
| 选台旋钮 |
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80. | best answer test |
| 选答测验 |
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