浙江杭州3M 061X精密研磨砂紙 型 號(hào): 3M 061X 產(chǎn) 地: 美國(guó) 運(yùn) 輸: 海陸空 3M Lapping Film, 061X Discs Slurry coated chrome oxide mineral in 0.5 micron on 3 mil polyester backing. Chrome oxide is used for final finishing of magnetic audio and video tape heads. Chrome oxide aids the final polishing of bi or tri-metal substrates used in magnetic hea