Meanwhile, there were not significant differences in wood airdrydensity, mechanical strength and cell wall percentage of intra provenance.
种源内木材气干密度、力学强度及胞壁率差异不显著，管胞长、宽和壁厚的差异均显著且高于种源间的差异。
2
The paper discusses the difference between coal dry beneficiation with air dense medium fluidized bed and other traditional separations in keeping density stability.