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US2387353A
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Safety device for pressure vessels
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US2331504A
|
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Method of making pressure vessels and the like
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US2302252A
|
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Thermostatic valve
|
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US2320447A
|
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Device for determining flow volume of treating liquids
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US2268961A
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Vessel for containing high pressure fluids
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US2273736A
|
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Method of making pressure vessles and the like
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US2216296A
|
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Shut-off valve for tank discharge lines
|
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US2193466A
|
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Tank drain
|
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US2242547A
|
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Safety pressure device
|
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US2163436A
|
|
Chemical feeding apparatus and automatic control therefor
|
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US2157305A
|
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Spray extractor
|
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US2158381A
|
|
Metering apparatus
|
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US2167160A
|
|
Apparatus for treating liquids
|
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US2146092A
|
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Valve
|
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US1950191A
|
|
Float
|
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US1910259A
|
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Welding gantry
|
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US1930960A
|
|
Safety device for high pressure vessels
|
|
US1916528A
|
|
Spray extractor
|
|
US1897398A
|
|
Inverse valve control for liquid and gas separators
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US1913564A
|
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Tell-tale wear plate
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