| 1. | The working projection plane is taken at the equatorial plane corresponding to the ground surface .
工作投影面为赤道平面相当于地平面。 |
| 2. | The source of the primary electromagnetic energy must, for reasons of safety, be from 200 to 500ft above ground surface .
为了安全起见，初始电磁波的源必须位于地面上空200500英尺范围内。 |
| 3. | Ground surface indicators in public traffic areas
位于公共交通区的地面指示器 |
| 4. | Research on laws of ground surface movements in yungaishan colliery
云盖山煤矿地表移动规律研究 |
| 5. | Ground surface movements and deformations due to shaft construction
竖井建设引起的地表移动及变形 |
| 6. | The thickness and width of grinding surface
研磨面的厚度或宽度 |
| 7. | Influence of shallow tunnel excavation on ground surface buildings
浅埋隧道开挖对地表建筑物的影响 |
| 8. | Three dimensional mechanical predicting model for ground surface movement
煤矿地表移动三维力学预计模型 |
| 9. | Fill up uneven ground surfaces to prevent accumulation of stagnant water
地台凹陷地方要填平，以防积水。 |
| 10. | Study on ground surface subsidence due to underground tunnel excavation
隧道开挖引起地表下沉及其影响分析 |
