... and certificate 3.20 years 4 ways butterfly type, tri-glide for handbags,bag buckle,DS521# ... factory buildings,2 large warehouses,several assembly lines,computer gone,sparking machie,driller,lathe,milling machine ... a report for customers. 4 ways butterfly type, tri-glide for handbags,bag buckle,DS521# ... test,Oscillation test, Tension test 4 ways butterfly type, tri-glide for handbags,bag buckle,DS521#B ...