Tra từ Ordnance Survey - Từ điển Oxford Advanced Learner 8th

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Từ điển Oxford Advanced Learner 8th

Ordnance Survey

Ordnance Survey [Ordnance Survey] BrE NAmE (abbrOS)
the British government organization responsible for making maps of Britain. These are available in a range of different scales, some of which are very detailed. They are especially popular with people who enjoy walking in the countryside. The OS was started in 1791 to make maps for the army. It also produces historical maps.