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frustum
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frustum
[ˈfrʌstəm]
(pl. frusta -t
ə 或
frustums)
(Geometry)the portion of a cone or pyramid which remains after its upper part has been cut off by a plane parallel to its base, or which is intercepted between two such planes
(几何)平截头体,截头锥体
语源
mid 17th cent.: from Latin, piece cut off'
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