compression parallel to grain

例句：

1. 1. The engineer used a specialmachine to compress parallel to the grainof the material.
   工程师使用一种特殊的机器来平行于材料颗粒进行压缩。
2. 2. The researcherfound that the compression parallel to the graincould significantly improve the mechanical properties of thematerial.
   研究者发现，平行于颗粒的压缩可以显著改善材料的机械性能。
3. 3. In thisstudy, we investigated the effect of compressionparallel to the grain on the strength andtoughness of metals.
   在这项研究中，我们探讨了平行于颗粒的压缩对金属强度和韧性的影响。