broken line lock relay

twist lock relay

lock-on relay

lock-up relay

centershift lock pin lock position

FR-FR Frame Relay – to – Frame Relay

phase-rotation relay phase-sequence relay

phase-sequence relay phase-rotation relay

slow-release relay (=slow-releasing relay)

(+)Testing device for heat lock-on pre

124A lock-in amplifier

5-step ship lock

ABS (Anti-lock braking system)

ABS Anti-lock Brake System

ABS anti-lock braking system

accelerator lock

access control lock

access lock

active-lock