相对密度 xiāngduìmìdù relative density Definitions Defs Origin Strokes Stroke Words Sentences Sents 相对密度 相對密度 xiāngduìmìdù relative density relative density; the ratio of the density of a substance to the density of a standard reference material
相对密度 相對密度 xiāngduìmìdù relative density relative density; the ratio of the density of a substance to the density of a standard reference material
