long-period wave - magnetic resonance log
- low-frequency wave
- low-frequency wave pattern
- low-frequency wavetrain
- low-grade
- low-grade material
- low-grade metamorphism
- low-grade oil
- low-grade ore
- low-impedance bed
- low-impedance layer
- low-inclined
- low-level bog
- low-lying
- low-permeability formation
- low-power objective
- low-relief high
- low-relief structure
- low-resistivity
- low-resistivity bed
- low-resistivity formation
- low-resistivity layer
- low-resistivity material
- low-resistivity medium
- low-resistivity rock
- low-resistivity structure
- low-resistivity zone
- low-resolution sampling
- low-set
- low-shale volume reservoir
- low-sulphur coal
- low-tension fuse head
- low-tension fusehead
- low-type machine
- low-velocity formation
- low-velocity interbedded layer
- low-velocity layer
- low-velocity layer correction
- low-velocity layer survey
- low-velocity layer thickness
- low-velocity layer works