±800 kV DC transmission system
1 550 nm optical fiber transmission system
1 550nm transmission system
1000 kV AC power transmission system
1000 kV AC transmission system
1310nm transmission system
500 kV power transmission system
500 kV transmission system
660 kV DC power transmission system
800 kV DC transmission system
AC and DC hybrid transmission system
AC drive transmission system
AC-DC hybrid transmission system
acoustic transmission system
Automatic hydrologic data acquisition and transmission system
Automatic Hydrological Data Acquisition and Transmission System
automatic picture transmission system
batch type data transmission system
bipolar HVDC transmission system