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Hardness tester
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Air charging control and system
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US2291283A
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Automatic control system
|
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US2210764A
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Miniature bulb and socket construction
|
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Individually illuminated instrument casing
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US2190875A
|
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Miniature bulb and socket construction
|
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Illuminating indicating instruments
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Illuminable panel, dial, and pointer structure
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Internal siphon for pressure gauges
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Gauge valve
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Meter
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Steam gauge
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Magnetic compass
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Nonremovable chart holder
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Internal siphon gauge
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Internal siphon gauge
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|
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Concealed trap for internal siphon gauge
|
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|
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Gauge
|
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US2134092A
|
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Brake tester
|
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US2123652A
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Control device
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