rock-garden - running wheel
- rock-garden
- rocker
- rocker bearing
- rocker conveyor
- rocker-dump hand cart
- rockery
- rocket carrier
- rocket probe
- rocket-armed
- rockfill
- rockfill blanket
- rockfill dam
- rockfill drain
- rocking
- rocking column
- rocking conveyor
- rocking pier
- rocking pillar
- rocking screen
- rocking stanchion
- rockscape
- Rockwell hardness
- Rockwell hardness test
- Rockwell hardness tester
- Rockwell method of hardness testing
- Rockwell superficial hardness test
- rockwell unit
- rockwork
- rod
- rod bender
- rod connection
- rod copper
- rod element
- rod extensometer
- rod float
- rod fork
- rod hole
- rod iron
- rod level
- rod reinforcement
