rein - rig
- reinforce
- reinforced filler paste
- reinforced plastic
- reinforced reaction injection molding
- reinforcement
- reinforcement of weld
- relative atomic mass
- relative humidity: (RH)
- relay
- relay lever
- relay rod
- relay valve
- release
- release agent
- release bearing
- release button
- release finger
- release fingers
- release lever
- release skewer
