3M:精密研磨卷（EMMD）:261X262X263X266X461X462X466X468X464XW268L262L266L366L272L362L372L373L472L971X661X662XW666XY668X863XW661XU260L360L3M微型马达专用抛光带：3M抛光带261X:1.2mm1.4mm1.6mm2.0mm2.5mm3.2mm3.8mm4.0mm4.5mmX183m)