Determination of true relative density of coal by helium replacement method was researched in this paper. 就氦气替换法测定煤的真相对密度(RD)进行了研究。
Having low relative density or specific gravity. 具有很小的相对密度(RD)或者比重。
Mass loss rates of fir leaf litter appeared consistent with the taxa and individual relative density of soil fauna. 不同孔径凋落物袋内土壤动物的类群和个体相对密度(RD)与凋落叶的质量损失率呈现相对一致的变化趋势。
Test method for density and relative density of plastics GB/T1033-1986塑料密度和相对密度(RD)试验方法
Effects of Strain Rate and Relative Density(RD) on Compressive Properties of SiCp / ZL104 Composite Foams 应变率和相对密度(RD)对泡沫SiCp/ZL104压缩性能的影响