chain of graphical triangulation

测量学专业... ... 图解曲线 diagrammatic curve 图解三角销 chain of graphical triangulation 图解视距仪 diagram-tacheometer ...

... "列岛"," chain islands" "图解三角锁"," chain of graphical triangulation" "菱形三角锁,辐射三角锁"," chain of lozenge" ...