... ISO9001:2000 Excellent after-sales OEM Resinoid bond grinding cutting wheel sizeSharpening steel and other tools;Durable,wide ... used for external circular grinding, inner circular grinding, surface grinding, the grinder of grinding machining.AdvantageXI'AN BONDYU ... years experience in producing Grinding Cutting Wheels, Gun Drills, Diamond Oilstone, Grinding Paste and Grinding File. We factory also ...