open slating - overheating
- open slating
- open socket shovel
- open space
- open space of screen
- open spanner
- open spillway
- open spiral auger
- open spiral hand auger
- open stairway
- open standardizing
- open steam
- open steam heating system
- open steel finish
- open steel flooring
- open stirrup
- open stirrup with a cap
- open storage area
- open storage ground
- open string
- open structure
- open system
- open tee joint
- open territory
- open test pit
- open timber floor
- open timbering
- open top tank
- open traverse
- open trench
- open trough
- open trough urinal
- open type exhaust canopy
- open typification
- open V runway configuration
- open valley
- open vent
- open water surface
- open web
- open weir dam
- open well
