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41. | Earth Increment |
| 地球增资 |
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42. | earth telegraphy |
| 地回路电报 |
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43. | earth anchorage |
| 地锚固定 |
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44. | earth oblateness |
| 地球扁率 |
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45. | earth conductivity |
| 大地电导率 |
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46. | earth excavation |
| 挖土方 |
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47. | earth connection |
| 接地线接地 |
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48. | earth insulation |
| 主绝缘 |
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49. | earth elasticity |
| 地球弹性 |
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50. | disintegrated earth |
| 坍塌土体 |
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