Industry:
- 全部
- West Germany
- ABB
- the people
- Chint
- Schneider
- the people of Shanghai
- domestic
- Shanghai
- OKI Oki Electric Industry of Japan
- Shanghai Electric Transmission and Distribution
- Tengen
- all Oe
- Jiuchuan
- MACK / Mark
- other
- 全部
- Isolation switch knife switch
- isolating switch
- high voltage isolation switch
- isolation knife switch
- load isolation switch
- low voltage isolation switch
- open-type knife switch
- Shanghai People's isolation switch
