mm Hg - nodulising drum
- nepheline concentrate
- nepheline slime
- neptunium
- net notch technique
- net stress
- neutral angle
- neutral axis
- neutral medium
- neutral point (plane)
- neutralization
- neutron diffraction analysis (study)
- neutron radiography
- Newnam forge
- Next Sintering Process
- Ni
- Ni-hard
- Ni-resist
- Nichrome
- nickel
- nickel (German) silver
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