... stable quality high brightness Ten years's export V shape diamond grooving wheel for glass Machine semi-automatic glass engraving machine ... Africa, Poland, Iraq. Czech, Korea, Japan, Tai wan, The United States, Canada. Company Established in 1998, Zhengzhou Longda Abrasives Co., Ltd is ... 160 3,6,8,10,15,2022,90 V shape diamond grooving wheel for glass