aluminium alloys - auxiliary tuyere
- antigraphitizer
- antimonial lead
- antimonial lead
- antimony
- antracite
- anvil
- anvil block
- AOD-Aigon Oxygen Decarburizing-process
- applied scientific forecast (prediction)
- approach
- approach (run-in, ingoing, entry, inlet) roller table
- apron (flat, platform) — and-belt conveyer
- apron conveyer
- apron conveyor
- Ar
- arc
- Arc Process
- arc welding
- area
- argon
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