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| 71. | direct-indicating viscometer |
| 直读粘度计 |
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| 72. | error indicating circuit |
| 误差指示电路 |
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| 73. | indicating direction finder |
| 指示测向仪 |
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| 74. | busy indicating circuit |
| 示忙电路 |
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| 75. | indicating flow meter |
| 指示流量表指示流量计 |
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| 76. | direct indicating compass |
| 直读罗盘 |
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| 77. | continuous indicating Loran |
| 连续指示罗兰导航系统 |
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| 78. | humidity indicating card |
| 湿度指示卡 |
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| 79. | density indicating meter |
| 密度指示计 |
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| 80. | course indicating beacon |
| 航线指示信标 |
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