n.红椿；马兰香椿；红椿木
The data, drawing drawings, under the bright lights, land surveying planning toon Lane Surveying and Mapping Institute of Surveying and Mapping Group members are busy with work. 整理数据，绘制图纸，明亮的灯光下，土地勘察规划测绘院红椿巷测绘组的队员们正在紧张繁忙地工作着。
