Improvements in electro-magnetic interrupters, impulsing devices or the like
- 申请公布号:
- GB361891(A)
- 申请号:
- GB19300022227
- 申请日期:
- 1930.07.23
- 申请公布日期:
- 1931.11.23
- 申请人:
- THE SIEMENS AND GENERAL ELECTRIC RAILWAY SIGNAL COMPANY LIMITED;HERBERT JOHN NAPIER RIDDLE;JOHN EDWARD CANDLER
- 分类号:
- H01H7/03
- 主分类号:
- H01H7/03