roofing system - sampler
- rough plank
- rough rubble
- rough rule
- rough runway
- rough surface
- rough terrain
- rough timber
- rough turning
- rough wall
- rough-axed brick
- rough-cast glass
- rough-cut joint
- rough-finished
- rough-ground
- rough-hewn timber
- rough-surfaced
- roughcast
- roughed-out
- roughen
- roughening
- roughening concrete surface
- roughening of highway surface
- roughing
- roughing tank
- roughneck
- roughness
- roughness coefficient
- roughness factor
- roughness of channel
- roughometer
- round
- round arch
- round bar
- round bar iron
- round brush
- round column steel form
- round duct
- round duct system
- round file
- round fitting