基準円すい頂点読み方
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- 基準円すい頂点の英語：基準円すい頂点 apex (reference cone)[機械]〈99B0102:歯車用語―幾何学的定義〉; cone apex (reference)[機械]〈99B0102:歯車用語―幾何学的定義〉; reference cone apex[機械]〈99B0102:歯車用語―幾何学的定義〉
