三角测量觇标的英文

• triangulation signal
• triangulation tower

• 三角测量:    triangulation; trigonometric ...
• 觇标:    surveyor's beacon; beacon; t ...
• 测量觇标:    survey signal; survey targets
• 大三角测量:    main triangulation; trigonometrical survey
• 弧三角测量:    arc triangulation