D
ELECTRICITY, GAS, STEAM AND AIR CONDITIONING SUPPLY
This section includes the generation, storage, control, distribution, trade and brokerage of electric power or of gaseous fuels for energy supply through a permanent network of lines, mains and pipes. Energy supply for industrial parks or residential buildings is included. This section therefore includes the operation of electricity and gas utilities.
1
大类
4
中类
12
小类
直属分类 · 1 项