生產陶瓷結合劑SG系(xi)列、CBN系(xi)列、剛(gang)玉系(xi)列、碳化(hua)硅系(xi)列的內(nei)圓平型(xing)、異型(xing)小(xiao)砂輪和(he)各種(zhong)公英制柄(bing)徑(jing)的小(xiao)砂輪