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Speedglas welding helmet. The modern welding helmet used today was first introduced in 1937 by Willson Products. [5] In 1981, Swedish manufacturer Hornell International (now owned by 3M [6]) introduced an LCD electronic shutter that darkens automatically when sensors detect the bright welding arc, [7] the Speedglas Auto-Darkening Filter. With ...
Federal Reserve officials held interest rates steady after their latest policy meeting, drawing sharp criticism from President Donald Trump.
Roman ridge helmet (Berkasovo I), early 4th century AD. Made of iron and sheathed in silver-gilt, it is decorated with glass gems. From the "Berkasovo treasure", Museum of Vojvodina, Novi Sad . The Late Roman ridge helmet was a type of combat helmet of Late Antiquity used by soldiers of the Late Roman army. It was characterized by the ...
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