room conveyer - sand-clay matrix
- rotary tidal current
- rotary tidal streams
- rotary tippler
- rotary well
- rotary-disc grizzly
- rotary-field electromagnetic method
- rotary-percussive drilling
- rotary-type dryer
- rotating dipole
- rotating dipole field
- rotating drum
- rotating electromagnetic field
- rotating gear
- rotating mechanism
- rotating stage
- rotation
- rotation chuck
- rotation of columns
- rotation-inversion axis
- rotational deformation