4. Measuring and testing
  5. With fluid pressure
  6. Porosity or permeability

Hartley Controls Corporation

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Apparatus and apparatus for mixing and cooling molding sand

Agitating – Mortar mixer type – Methods
Patent

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Apparatus for mixing molding sand

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Automatic bond determinator

Measuring and testing – Specimen stress or strain – or testing by stress or strain... – By loading of specimen
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Automatic compactability tester

Measuring and testing – Specimen stress or strain – or testing by stress or strain... – By loading of specimen
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Current relay actuated by multistage amplifier's total current d

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