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〔中国选定的非SI的国家法定计量单位〕
释
hectare
公顷
土地面积的单位。符号ha。
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quadric
quadric cone
quadric curve
quadric cylinder
quadricell
quadric hypersurface
quadricorrelator
quadric parameter
quadric [surface]
quadric surface
quadricycle
quadrielectron
quadrifolium
Quadriga of St. Mark's Basilica
quadrilateral
quadrilateral of chords
quadrilateral tiling
quadrilateral web
quadrilinear form
quadrille
quadrillion
quadrinomial
quadrinomial equation
quadripartite curve
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