流体流动过程，包括流体输送，过滤，固体流态化。
Fluid flow processes, including fluids transportation, filtration, solids fluidization.
选用三种颗料状物料，在四种不同倾斜度的斜管中测定了不同负压差和固体流率条件下的气体流率。
The experimental data of gas flow rate in the bed with four slant angles and three kinds of particle materials are obtained.
淤泥，粘土和土坯往往是固体流，而不是障碍，吸收水，因此考虑在沙子，覆盖或其他材料，以增强吸收低孔隙度地面。
Silt, clay and adobe often form solid barriers that shed water instead of absorbing, so consider adding sand, mulch or other absorption enhancing materials to low-porosity ground.
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