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US1788685A
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Conveying apparatus
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US1770059A
|
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Combustion control
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US1770081A
|
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Heat-treating furnace
|
|
US1777272A
|
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Thermostat switch
|
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US1771853A
|
|
Heat-treating furnace
|
|
US1792074A
|
|
Heat-treating furnace
|
|
US1789136A
|
|
Process of annealing gray iron
|
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US1784812A
|
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Furnace and conveyer therefor
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US1690829A
|
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Regulating apparatus
|
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US1690819A
|
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Regulating apparatus
|
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GB211583A
|
|
Improvements in and relating to conveyer mechanism more particularly adapted for use in furnaces
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US1574107A
|
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Method of and apparatus for mixing and proportioning gases
|
|
US1466356A
|
|
Method of and apparatus for mixing and proportioning gases
|
|
US1440540A
|
|
Method of and apparatus for heat treatment
|
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US1466018A
|
|
Feeding mechanism
|
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DE407758C
|
|
Firing with surface combustion
|
|
US1539170A
|
|
Door-operating mechanism
|
|
GB117612A
|
|
Improvements in and relating to Apparatus for Mixing Gases.
|
|
US1350095A
|
|
Method of and apparatus for unloading pumps
|
|
US1295086A
|
|
Jet apparatus.
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