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| 71. | directinal mirror |
| 定向反射镜 |
|
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| | |
| 72. | rough orientation |
| 粗略定向 |
|
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| | |
| 73. | azimuthal orientatio |
| 方位定向 |
|
|
| | |
| 74. | directional collector |
| 定向收集器 |
|
|
| | |
| 75. | perceptual orientation |
| 知觉定向 |
|
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| | |
| 76. | etching orientation |
| 腐蚀定向 |
|
|
| | |
| 77. | opposite orientation |
| 反定向 |
|
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| | |
| 78. | directional aids |
| 定向器材 |
|
|
| | |
| 79. | normal orientation |
| 正常定向 |
|
|
| | |
| 80. | directional drilling |
| 定向钻孔 |
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| | |