1,Our products has been approved by GL,ABS,DNV,LR,KR,NK,CCS,RINA and so on. 2,All ... approved by GL,ABS,DNV,LR,KR,NK,CCS,RINA and so on,and obtained the anthentication certificate of Quality system Iso9001-2000We ... can design research ,develop and produce all kinds of marine copper alloy propellers ...