 TEMECULA, Calif., Dec. 14, 2022 GLOBE NEWSWIRE Nikkiso Clean Energy Industrial Gases Group Group, a part of the Nikkiso Co., Ltd Japan group of companies, is proud to have been awarded DNVs Management System Certificate and ISO 9001:2015 certification. The award was presented to George Pappagelis, President of Nikkiso Clean Energy Industrial ... The post Nikkiso Clean Energy Industrial Gases Group Awarded DNVs Management System Certificate and ISO 9001:2015 Certification appear... 