raw emery paper是什么意思

用法例句

Study on frost heaving susceptibility of medium sand and coarse sand of highway subgrade in seasonally frozen ground region;

季冻区公路路基中粗砂冻胀性研究

This paper analyzes the geology and works out new fracturing technologies for the two oil provinces, which are compound fracturing, coarse solids fracturing, and liquid nitrogen fracturing.

本文通过对刘庄和胡状集油区的地质情况进行分析 ,研究出适合两个油区的压裂新工艺技术———复合压裂、粗砂压裂和加液氮压裂工艺技术。

Experimental study on uniaxial tensile strength characteristic of grit stone after high temperature;

高温后粗砂岩单轴抗拉强度实验研究

The earth dam of Houlonghe reservoir are built with gravelly coarse sand bed as dam base, and artificially filled in gravelly coarse sand as upstream and downstream sanded shell with loose structure, which cannot meet the needs of earthquake-resistance.

后龙河水库坝基为砾质粗砂层,上、下游砂壳为人工堆填的砾质粗砂,结构松散,多数不满足抗震要求。