The process and mechanism of sand compaction are elucidated.

阐述了其实砂过程及实砂机理。

youdao

The main factors influencing sand compaction on EPC are vibration acceleration and negative pressure.

消失模铸造工艺影响干砂紧实的主要因素是振动加速度和负压度。

youdao

The test results showed that: two-step air impactmoulding process can achieve the moulds with high and uniform sand compaction;

前言： 研究表明：双冲击造型可以大大提高砂型紧实度及其均匀性；

youdao

"All this heavy machinery and vehicles caused a lot of soil compaction, changed the landscape, and allowed more sand to move and caused a lot of erosion, " she said.

CNN: November 12, 2012 -- Updated 1223 GMT (2023 HKT)