closure section - command
- collapsible lifeboat
- collapsible mast
- collapsible mould
- collapsible scafford
- collapsible seat
- collapsible stretcher
- collapsible tap
- collapsible timbering
- collapsible top
- collapsible whip aerial
- collapsing
- collapsing force
- collapsing length
- collar
- collar beam
- collar bearing
- collar bush
- collar flange
- collar journal
- collar mark
