removable blade - Richmond group
- review of the information
- revised surface geology
- revitalization
- revitalize
- revival
- revived
- revived faulting
- revived river
- revived structure
- revivification
- revolution
- revolve
- revolving barrel
- revolving bed plate
- revolving chamber
- revolving cup analyzer
- revolving drum screen
- revolving frame
- revolving gear
- revolving nosepiece