“origin of rifling”的概念、定义、翻译、参考文献-科学参考

单词	origin of rifling
释义	origin of rifling [`är·ǝ·jǝn ǝv `rīf·liŋ] ^ORDNANCE The position in a rifled gun bore at which the rifling begins; more specifically, the plane, perpendicular to the axis of the gun bore, in which the rifling starts.
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