High-speed railway Out-locking switch
Automatic switch electromagnetic locking
switch point locking mehod
coupled (linked)switch,deck switch,gang switch
logical locking and electrical locking
Air Switch，Air-break Switch
switch on and switch off
switch point；point tongue；switch rail；tongue rail；blade
whippletree switch whiffletree switch
[endoscopic]locking knob
2PL two-phase locking protocol
A new phase locking method with zero crossing
absolute frequency locking
active-active transient mode-locking technology