... ABS, BV, CCS, DNV, GL, KR, LR, NK, RINA, PRS, RS, IRS Material: Bronze, Aluminum Bronze, Nickel Aluminum Bronze, Manganese-Aluminum ... , BV, CCS, DNV, GL, KR, LR, NK, RINA, PRS, RS, IRS and etc., and we're working under Quality System ISO9001:2000 ... ABS, BV, CCS, DNV, GL, KR, LR, NK, RINA, PRS, RS, IRS