steemitboard (66)in #d • 5 years agoRE: A blockchain use case essay for coltan supply chain in CongoCongratulations @justinwelcome! You received a personal award! Birthday! - You are on the Steem blockchain for 2…steemitboard (66)in #d • 6 years agoRE: A blockchain use case essay for coltan supply chain in CongoCongratulations @justinwelcome! You have received a personal award! 1 Year on Steemit Click on the badge to…balkcracker (29)in #liza • 6 years agoRE: liza elite claimsent