短語詞組短語specific mass gravity 體積比重liquid specific -gravity balance 液體比重天平apparent specific gravity [物]表觀比重;[物]視比重;虛表比重;表觀此重Real specific gravity 真比重leafs specific gravity 葉specific gravity hydrometer 石油相對密度計;[物]液體比重計average specific gravity 平均比重lower specific gravity 比重小dry bulk specific gravity 干松比重 返回 specific gravity