auxi - base
- back surface
- back weld
- back-connected
- back-draft valve
- back-end (extrusion) defect
- back-extruded metal
- back-ground noise
- back-pull
- back-pull drawing
- back-pull wire-drawing machine
- back-reflection arc
- back-reflection camera
- back-reflection line
- back-reflection method
- back-reflection pattern
- back-reflection photograph
- back-reflection ring
- back-scatter system
- back-scattered electrons
- back-scattered radiation
- back-scattering factor
- back-tension bridle
- back-tension drawing
- back-up die
- backdraft
- backdraft stack
- backdraft system
- backed butt joint
- backed-up pressure regulating roller leveller
- backed-up roller leveler
- backed-up roller leveller
- backed-up roller leveller without pressure regulation
- backfill
- backfin
- backfire
- background blackening
- background coloration
- background current
- background density
- background due to thermal scattering