GB: GB is the Chinese Pinyin abbreviation of “National Standard”, which means the national standard of the People’s Republic of China.

ISO: The English abbreviation of the International Organization for Standardization. Its full name is International Organization for Standardization or International Standard Organized

IEC: is the abbreviation of International Electro Technical Commission (International Electro Technical Commission). She is also a non-governmental international organization and a Grade A consulting organization of the United Nations Social and Economic Council. It was formally established in 1906 and is the world’s earliest specialized international standardization organization.

IEEE: Institute of Electrical and Electronics Engineers (IEEE) The Institute of Electrical and Electronics Engineers (IEEE) is an international association of electronic technology and information science engineers. GB is the national standard Chinese pinyin abbreviation. China’s national standards.

IEC: It is the abbreviation of the International Electrotechnical Commission. The corresponding standard is the standard established by this International Organization for Standardization, which is mainly the international standard understood by electricians.

ISO is the abbreviation of International Organization for Standardization, and the corresponding standard is indicated by ISO+ number, which is wider than the standard scope of IEC. IEEE is the abbreviation of the Institute of Electrical and Electronics Engineers, and its standards cover the fields of space, computers, telecommunications, biomedicine, power, and consumer electronics.