丝袜美腿护士办公室在线观看,国产综合区,欧美亚洲一级片,久久综久久美利坚合众国,a在线免费视频,精品欧美成人高清视频在线观看,交视频在线观看国产网站

QA15-25 new type steel structure shot blasting machine is mainly used for shot blasting of steel structure parts. Using the high-speed rotating impeller of the shot blaster to accelerate the shot ball to the surface of the workpiece, impact and scrape the surface of the workpiece, not only can clean the sand, rust and dirt on the surface of the workpiece, but also eliminate the surface stress of the workpiece. The surface is shot blasted to improve the fatigue strength of the workpiece, increase the adhesion of the paint film when the workpiece is painted, and finally achieve the purpose of improving the surface and internal quality of the whole workpiece.