solid fuels. coke. determination of true relative density, apparent relative density and porosity.
固体燃料.焦炭.相对真密度、相对表观密度和孔隙度测定
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discussion on improving the accuracy of coal true relative density measurement
提高煤的真相对密度测定准确性的探讨
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brown coals and lignites - determination of true relative density and apparent relative density
褐煤.实际相对密度和表面相对密度的测定
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