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US2206109A
|
|
Copper-zinc alloys
|
|
DE690676C
|
|
Waste heat boiler for utilizing roast gases with a high content of acid fumes
|
|
US2144993A
|
|
Copper-zinc alloys
|
|
GB478911A
|
|
Method of activating clays or like siliceous crude earths
|
|
DE682641C
|
|
Procedure for activating raw earths
|
|
DE704397C
|
|
Shaft furnace
|
|
GB467358A
|
|
Improved method and means for the treatment of ores, fuels and the like
|
|
US2156348A
|
|
Copper-zinc alloys
|
|
US2006601A
|
|
Corrosion-resistant, mechanically workable alloy
|
|
US2006600A
|
|
Corrosion-resistant and malleable alloy
|
|
GB414212A
|
|
Corrosion-resistant and malleable alloys
|
|
GB418772A
|
|
Corrosion-resistant and mechanically workable alloys
|
|
US2006599A
|
|
Mechanically workable alloy
|
|
US2006598A
|
|
Corrosion-resistant and malleable alloy
|
|
GB336423A
|
|
Improvements in and relating to electric fuses for blasting
|
|
DE589209C
|
|
Short-circuited electric igniter
|
|
DE562732C
|
|
Method for securing electrical ignition systems against premature ignition by stray currents or the like.
|
|
CA372337A
|
|
Earth activating method
|
