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| 61. | focus coil axis |
| 聚焦线圈轴 |
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| 62. | Focus(focal line) |
| 焦点(线) |
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| 63. | line focus collector |
| 行聚焦型集热器 |
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| 64. | focus of action |
| 动作焦点 |
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| 65. | fixed-focus objective |
| 固定焦距物镜 |
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| 66. | focus [focusing] lens |
| 聚焦透镜 |
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| 67. | follow focus attachment |
| 跟踪调焦装置 |
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| 68. | focus lens region |
| 透镜聚焦范围 |
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| 69. | follow focus viewer |
| 跟焦寻象器 |
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| 70. | focus of attention |
| 注意焦点 |
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