- minor triangulation
- subsidiary triangulation
- 小: small; little; petty; minor
- 三角测量: triangulation; trigonometric ...
- 大三角测量: main triangulation; trigonometrical survey
- 弧三角测量: arc triangulation
- 三角测量: triangular surveying; triangulate; triangulation operations; triangulation survey; triangulation work; trigonometric surveying; trigonometrical survey
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