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| 91. | directional emissivity |
| 定向发射率 |
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| 92. | normal orientation |
| 正常定向 |
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| 93. | etching orientation |
| 腐蚀定向 |
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| 94. | directional radiatio |
| 定向辐射 |
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| 95. | directinal mirror |
| 定向反射镜 |
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| 96. | directional drilling |
| 定向钻孔 |
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| 97. | directional aids |
| 定向器材 |
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| 98. | directional orientation tool |
| 定向工具 |
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| 99. | directional collector |
| 定向收集器 |
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| 100. | directional vane |
| 定向叶片 |
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