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on-off system | |||
switching system | |||
switch system | |||
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switching system |
开 关 系统 : 34 phrases in 11 subjects |
Agriculture | 1 |
Automobiles | 1 |
Aviation | 6 |
British usage, not spelling | 1 |
Electronics | 5 |
Geophysics | 1 |
Hydroelectric power stations | 1 |
Metallurgy | 1 |
Oil / petroleum | 1 |
Space | 2 |
Technology | 14 |