砂粒粒度分布
sand-grain-size distribution
砂粒粒径
particle size
diameter of emery particle
砂轮砂粒粒径
grit diameter of grinding wheel
低温微粒撞击
low-temperature supersonic fine particles bombarding
飞灰颗粒撞击率
flue gas particles impact rate
充填砾石与地层砂粒度中值比
median pack-to-formaton grainsize ratio
充填物与地层砂粒度中值比
pack-to-formation median grain size ratio