datum circle
plural of emeu
(ecology) rehabilitation of an ecosystem, typically in order to save an important threatened species
(engineering) A circle which serves as a reference or base for the measurement of other quantities.
(historical) A supporter of William Pitt, 1st Earl of Chatham (1708–1778), British Whig politician.
機械工は軸を整列させるために、すべての半径方向の測定の主要な基準として基準円を用いた。
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