4. Electric heating
  5. Metal heating
  6. By arc

Manfred Zaeper

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Apparatus for hardening the inside contour of a gun barrel with

Electric heating – Metal heating – By arc
Patent

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Apparatus for producing rifling grooves in a weapon barrel

Firearms – Barrels – Method of making or modifying by metal working
Reexamination Certificate

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Profile ID: LFUS-PAI-P-947836

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