... professional manufacturer for 14 years durable ISO2008 high cutting efficiency LONGDA BDK engraving wheel for CNC machine in china PRODUCT DESCRIPTION ... wan, The United States, Canada.CompanyEstablished in 1998, Zhengzhou Longda Abrasives Co., Ltd is a specialized enterprise that engages in the research, production ... 8,10,15,20501603,6,8,10,15,2022,90 LONGDA BDK engraving wheel for CNC machine in china