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71. | space indicating |
| 空间标志 |
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72. | reference indication |
| 引用标志 |
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73. | identification mark |
| 辨识标志 |
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74. | [England] via air mail | [France] par avion | [Spain] correo aereo |
| 航空[标志 |
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75. | conventional indication |
| 通用标志 |
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76. | accurate indication |
| 正确标志 |
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77. | contact disignation |
| 触角标志 |
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78. | substitution indices |
| 替换标志 |
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79. | routine denotation |
| 例行程序标志 |
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80. | capsize indicator |
| 倾覆标志 |
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