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DE1558987A1
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Recoverable well packer
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Process for the extraction of sulfur dioxide from gypsum
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GB1106570A
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Improvements in or relating to cranes
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Process for the production of titanium tetrachloride
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Process for the production of polyesters, especially polycarbonates, through interfaces, polycondensation in a continuous system
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Device for the hydromechanical comminution of the coke cake formed by the continued cracking of petroleum residues in a coking chamber
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Method of obtaining penicillin with a long-lasting effect
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Process for the continuous purification of gaseous formaldehyde
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Separation and extraction process for metals from aqueous solutions with alkali naphthenates, dissolved in non-polar organic solvents
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Limiting device for the pulley stroke in lifting devices of drilling rigs or the like.
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Rodless piston deep pump for use in oil wells
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Process for the extraction of potassium salts from complex minerals that contain potassium in the form of poly-minerals
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DE1228611B
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Process for the production of N, N-di- (beta-chloro-ethyl) -aminophosphoric acid dichloride
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Process for the production of polyacrylonitrile
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Process for the extraction of sulfur dioxide from gypsum
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DE1230779B
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Process for the production of aminoguanidine bicarbonate
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DE1272932B
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Process for the purification of ethylene carbonate
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DE1468375B1
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Arc reactor for the production of acetylene
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DE1280444B
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Induction heating device for oil and gas wells and pipelines with a ferromagnetic pipe
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DE1450367A1
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Process and automatic device for cathodic protection of buried metal pipelines
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