- Recovered Paper
- Recycling
- Red
- Red Bean
- Red Meranti
- Reducer
- Reducing Agent
- Reduction
- Refillable
- Refills
- Refined Copper
- Reflective
- Reflective Film
- Reflector
- Reflector Parts
- Reflectors
- Refractory
- Refractory Bricks
- Refractory Cements
- Refractory Ceramic
- Refractory Surfacing
- Refri
- Refrigerating
- Refrigerators
- Regenerated Cellulose
- Regulat
- Reinforced
- Relay
- Relays
- Remote
- Remote Control
- Repellent
- Reservoir
- Resin
- Resin Cements
- Resins
- Resistance
- Resistance Welding
- Resistors
- Resonance
- Resonance Imaging
- Resorcinol
- Retreading
- Revolution
- Rheostat
- Rhodium
- Ribbons
- Rice
- Rifampicin
- Rigid