Old soldering means by Roger of Helmarshausen (Theophilus Presbyter) rediscovered. Film shows test of fine gold.
Goldsmiths art archaeology. Making antique solder, so that the old Goldsmith's art will not be forgotten.
Musical compositions, technical achievements and Video production from Guido Graeff
Негізгі бет Ғылым және технология Old soldering means by Roger of Helmarshausen
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