grit blast

基本解释

If the substrate is metal, I sand blast it when possible or use 80 grit emery paper as a second choice.
如果基板是金属，如可能我就喷砂或者，作为第二选择80粒度的金刚砂纸。
Residual shot grit and dust shall be completely removed after blasting preferably by vacuum cleaning but otherwise by oil and water free air blast or fibre brush.
喷砂之后应完全清除掉剩余的弹丸、砂砾和灰尘，最好通过真空真空吸尘清除，要不然则通过不含水和油的空气喷射或纤维刷子。
Weld preparations shall be machined(1000 RMS maximum surface roughness); grit blasted( near white blast), wired brushed or ground to bright metal, prior to welding.
焊接前的准备工作应包括机械加工（1000 RMS 最大表面粗度）；喷砂（出白级喷砂），手工刷除或打磨成光洁金属。