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.
如果基板是金屬，如可能我就噴砂或者，作爲第二選擇80粒度的金剛砂紙。
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.
噴砂之後應完全清除掉賸餘的彈丸、砂礫和灰塵，最好通過真空真空吸塵清除，要不然則通過不含水和油的空氣噴射或纖維刷子。
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.
銲接前的準備工作應包括機械加工（1000 RMS 最大表麪粗度）；噴砂（出白級噴砂），手工刷除或打磨成光潔金屬。