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| 61. | tangent projection |
| 切面投影 |
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| 62. | projection facilities |
| 投影设施 |
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| 63. | projection light source |
| 投影光源 |
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| 64. | schmidt projection |
| 施密特投影 |
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| 65. | projection objective |
| 投影物镜 |
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| 66. | projection grinder |
| 投影磨床 |
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| 67. | projector comparator |
| 投影比较仪 |
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| 68. | analytical projectio |
| 解析投影 |
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| 69. | polar projection |
| 极投影 |
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| 70. | cartographic projection |
| 制图学投影 |
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