zero voltage switching or zero current switching
zero voltage-switching ZVS zero-current-switching
zero voltage-switching(ZVS)zero-current-switching(ZCS)
cargo plan [= cargo stowage plan
Master Plan and Detail Plan
(1+1)switching protection
1×N electro-optical switching
10kV standby power supply automatic switching device
18-pulse switching mode
220 kV switching station
500 kV switching station
7-year system switching to 8-year system
A and B polarization switching
A new method of voltage switching