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GB978775A
|
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Ultra high vacuum cold cathode ionization gauge
|
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US3217545A
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Low pressure gauge
|
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US3169693A
|
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Ion pump
|
|
US3190124A
|
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Bakeable mcleod gauge
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|
US3162760A
|
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Magnetron type mass spectrometer
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|
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Measuring device
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US3087055A
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Particle spectrometers with high transmission, dispersion and resolution
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|
US2947868A
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Mass spectrometer
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CA701373A
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Magnetron type mass spectrometer
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CA715226A
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Time sweep voltage generator for photoelectric null indicators
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CA693938A
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|
Cold cathode magnetron type ionization
|
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CA694700A
|
|
Two coordinate photoelectric null indicator
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|
CA748549A
|
|
Ultra high vacuum ionization gauge
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