???1)、磨料粒度:按顆粒尺寸大小分為粗砂24#220#、微粉類:GC?W63?240#? 產品用途:機器零部件拋光、金屬產品拋光、氣缸、活塞環、泵體、噴嘴、GC?W10?800#GC?W50?280#?GC?W7?1000#GC?W40?320#?GC?W5?1200#GC?W28?400#?GC?W3.5?1500#GC?W20?500#?GC?W2.5?2000#GC?W14?600#