light output - log-log paper
- lock frame
- lock gate
- lock gear
- lock guard gate
- lock in gear
- lock in synchronism
- lock joint
- lock lift
- lock magnet
- lock pin
- lock saw
- lock screw
- lock sill block
- lock stitch
- lock unit
- lock wall culvert
- lock washer
- lock wire
- lock with high lift
- lock with side ponds
- lock-and-follow scanner
- lock-chamber lateral culvert
- lock-discharge lateral culvert
- lock-emptying culvert
- lock-filer clamp
- lock-following strobe
- lock-gate pintle
- lock-in amplifier
- lock-in tube
- lock-on counter
- lock-out
- lock-out impulse
- lock-out jack
- lock-out tower
- lock-set
- lock-up
- lockage
- locked cable
- locked rope
- locked switch
