alum - arc
- an ion
- anacamptic sound
- anaerobic corrosion
- analar
- analcite
- analog device
- analog machine
- analogue device
- analogue machine
- analysis
- analysis line
- analysis of blast performance
- analysis of blast-furnace gas
- analysis of spectra
- analysis sample
- analytical error
- analytical reagent quality
- analyzer
- analyzing crystal
- anastigmat object glass
- anchor mixer
- anchor-ring method
- anchorage
- anchoring accessories
- ancillaries
- ancillary equipment
- ancillary minerals
- anelastic behavior
- anelastic deformation
- anelasticisity
- angle
- angle (flow) tuyere
- angle bar
- angle beam transmission inspection
- angle bending machine
- angle between probes
- angle brace
- angle of backing-off
- angle of beam spread
- angle of bell