true specific gravity meaning in English

压实比重
真比重

Method for the determination of the true specific gravity of pitch coke
沥青焦真比重的测定方法
Standard test method for apparent and true specific gravity and porosity of lump coke
块焦表观比重实际比重和孔隙度的标准试验方法
Standard test method for true specific gravity of refractory materials by water immersion
用水浸法测定耐火材料的准确比重的标准试验方法
Standard test method for true specific gravity of refractory materials by gas - comparison pycnometer
用气体比重法测定耐火材料真实比重的标准试验方法