（地图制作和使用者设的）三角点a position on a high place used as a reference point , especially by people who make and use maps. It is usually marked on the ground by a short stone pillar .
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对称点
trig point是什么意思及反义词_翻译trig... ... trig station 三角测站 trig point. n. 〈三角〉对称点 trig point 三角测量点 ...