slop - spec
- slope
- slope angle
- slope bottom
- slope cage
- slope collar
- slope conveyor
- slope failure
- slope mine
- slope of repose
- slope ratio
- slope slip
- slope stability
- slope to zero
- slope toe
- sloping
- sloping seam
- sloping tunnel
- slopping bed
- slot
- slot cut
- slot washer
- slot-and-wedge anchor
- slot-and-wedge bolt
- slot-and-wedge roof bolt
- slot-cutting machine
- slotted bit
- slotted bolt
- slotted opening
- slotted roof bolt
- slotter-type roof bolt
- slotting machine
- sloughing
- sloughing-off box
- slow
- slow down
- slow-match
- slow-setting
- slow-speed plough
- slow-speed rolls
- slow-speed shaft of the drive
