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ES143928A1
|
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Improvements in the apparatus for molding metal.
|
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ES143382A1
|
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Improvements in the equipment for melting metals.
|
|
ES143188A1
|
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Improvements in the equipment for melting metal.
|
|
ES115259A1
|
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Improvements in the manufacture of bars and metal plates and their like.
|
|
GB124266A
|
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Improvements in Roasting Complex Zinc Sulphide Ores or Concentrates, particularly in conjunction with the Manufacture of Sulphuric Acid.
|
|
GB124265A
|
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An Improved Muffled Chamber suitable for use as a Roasting Furnace or Kiln.
|
|
GB190804424A
|
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Improvements in Drying Blast for Metallurgical Furnaces.
|
|
GB190710525A
|
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Improvements in Drying Air Blast for Metallurgical purposes.
|
|
GB190625112A
|
|
Improvements in Drying Air for Blast Furnaces
|
|
GB189805409A
|
|
Improvements in Oil Lamps.
|
|
CA371703A
|
|
Metal casting apparatus
|
|
CA382986A
|
|
Metal casting apparatus
|
|
CA380889A
|
|
Metal casting apparatus
|
