According to the former solution of spherical or columnar hole about material strain-softening model, the model for grout bulb expansion is formed in compaction grouting.
根据他人已有的关于材料应变软化模型的球(柱)形孔扩张问题的解，建立了压密灌浆中的浆泡扩张模型。
Electromagnetic forming was applied to the powder material compaction, and PZT powder was compacted with low-voltage electromagnetic compaction.
将电磁成形技术用于粉末材料致密度研究中，以PZT粉末为研究对象，对其进行低电压电磁压制成形。
In rainy days, it is not suitable to carry on the spreading and compaction of filling material.
雨天不宜进行填料的摊铺和压实作业。
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