arc - auxi
- atomic grouping
- atomic hydrogen welding
- atomic hydrogen welding apparatus
- atomic ion
- atomic linkage
- atomic mineral
- atomic mobility
- atomic number
- atomic particle
- atomic percent
- atomic percentage
- atomic population
- atomic scattering factor
- atomic X-rays
- atomic-hydrogen arc
- atomic-hydrogen flame
- atomic-hydrogen weld
- atomic-size magnitude
- atomization
- atomization of molten metals
- atomized fuel
- atomized powder
- atomized-spray injector
- atomizer tip
- atomizing jet
- atoms in general positions
- atoms of high scattering power
- atoms of low scattering power
- attached edger
- attached moisture
- attaching parts
- attachment
- attachment flange
- attack
- attack polishing method
- attackable
- attenuate
- attenuation
- attraction field
- attractive Coulomb potential