Landlt's broken ring chart

例句：

1. 1. The surveyor used a landlt's broken ring chart to map the terrain.
   测量员使用土地测绘的破损环状图来绘制地形。
2. 2. The engineer had to reconstruct the landlt's broken ring chart due to the damage.
   由于损坏，工程师不得不重建土地测绘的破损环状图。
3. 3. The archaeologists used the landlt's broken ring chart to study the ancient site.
   考古学家利用土地测绘的破损环状图研究古遗址。