Solids have a foxed shape and volume, particles are arranged in a fixed structure.
有固定形状、体积，有固定分子排列结构的物质称为固体。
For solids, you cannot access the Immovable (No translation) option. The Fixed Geometry restraint however is the same as the immovable restraint for solids.
实体中没有这个命令，壳体中才有。固定几何体和这个命令是一致的。
The experimental results demonstrate that it can meet different requirements by adjusting the aeration when the solids flow rate in standpipe is fixed.
实验结果表明，在来料流率不变的情况下，通过调节控制风量，可以实现两种需求下的分配调节；
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