open - over
- open bell system
- open chain drive
- open circuit current
- open crib
- open cut
- open cuts
- open cutting
- open face
- open fault
- open fracture
- open hole
- open interval
- open joint
- open light
- open road drain
- open stone mixture
- open test pit
- open-bottom scoop
- open-circuit grinding
- open-circuit operation
- open-cut drainage
- open-ditch drainage
- open-end dump
- open-end mill
- open-end system
- open-grained
- open-hole device
- open-hole log
- open-hole logging
- open-hole logging tool
- open-hole survey
- open-joint drainage
- open-joint fissure
- open-pipe system
- open-pit edge
- open-pit floor edge
- open-side dump
- open-stope system
- open-textured mixture
- open-type mixture
