rigi - roun
- rigid (fixed) coupling
- rigid (non-flexible); sleeve-type coupling coupling
- rigid guide
- rigid half-plane
- rigid half-space
- rigid line of trough
- rigid metal electrode
- rigid obstacle
- rigid particle
- rigid reinforcement
- rigid; sleeve type coupling coupling
- rigid; solid coupling
- rigidity
- rigidity effect
- rigidity modulus
- rill cut
- rill cut-and-fill
- rill cut-and-fill system
- rill cutting
- rill slope-and-pillar system
