... plug dunker 4.standard:CEI 23-50-IIED.2007+V1 We introducced advanced manufacture and test equipments ... EUROPE BRAZIL SOUTH AFRICA KOREA AUSTRALIA ITALY SWITZERLAND ARGENTINA U.K. ENGLAN JAPAN ISRAEL U.S.A ... USA THAILAND TAIWAN ARGENTINA CHINA .Cusrtomer' satisfaction is our forever fenet. ... Japan PSE,Korea KTL,Italy IMQ,Africa SABS,Argentina IRAM,Israel SII, Brazil INMETRO,Taiwan BSMI, ...