2 Ergebnisse für: 2.875.656
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The Inside of Atomic Hydrogen Arc Welding, Part 2 - 1943 - YouTube
https://www.youtube.com/watch?v=Kz-S5wLGHwI
Instructional film on atomic hydrogen arc welding, a method of precision welding especially useful for light materials. Two tungsten electrodes, hydrogen gas...
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The Giant's Grave: the excavation - YouTube
https://www.youtube.com/watch?v=eBqd1m_vq80
Islay Heritage is exploring the appearance of the Neolithic on Islay by studying one of the first Neolithic burial tombs on the island: Slochd Measach, other...