fret是什么意思

用法例句

The preliminary scheme proposed is support reinforcement,and the final scheme is support post with man-excavated pile and bolting is put into practice.

针对浙东某山区危石的危害、规模、分布特征和稳定状况,提出了支撑加固方案,经过比选优化,根据施工反馈信息的调整,最终采用人工挖孔桩支挡柱加固方案,施工后效果良好。