Professional Translation:

National Technical Committee 9 for Explosion-proof Electrical Equipment Standardization (SAC/TC9)
SAC/TC9 serves as China's counterpart to the International Electrotechnical Commission's Technical Committee 31 (IEC/TC31) on electrical apparatus for explosive atmospheres.

IEC/TC31 China Office
The China Office of IEC/TC31 operates under SAC/TC9 Secretariat. Its responsibilities encompass:

• Managing all phases of IEC/TC31 documentation, including:
  › Electronic receipt and distribution of documents
  › Online voting for TC31 ballots
• Organizing participation of Chinese explosion-proof technology experts in:
  › IEC/TC31 international meetings
  › Development and revision of IEC international standards