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41. | ground radiometer |
| 地面辐射仪 |
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42. | ground gasoline |
| 地面汽车用汽油 |
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43. | ground location |
| 地面定位 |
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44. | ground temperature |
| 地面气温 |
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45. | ground locomotive |
| 地面用电力机车 |
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46. | ground pollution |
| 大地污染 |
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47. | ground nutshell |
| 碎坚果壳 |
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48. | ground settlement |
| 土地下陷 |
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49. | ground photograph |
| 地面摄影相片 |
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50. | ground visibility |
| 地上能见距离 |
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