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定向〔极化〕继电器 | |||
方向继电器 | |||
定向继电器; 极化继电器 | |||
定向中继 |
directional relay : 47 phrases in 11 subjects |
Agriculture | 1 |
Air defense | 2 |
Electrical engineering | 1 |
Electronics | 12 |
General | 1 |
Geophysics | 1 |
Hydroelectric power stations | 5 |
Metallurgy | 4 |
Oil / petroleum | 1 |
Shipbuilding | 1 |
Technology | 18 |