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crawford autovalve grinding machines
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crawford autovalve grinding machines

crawford autovalve grinding machines

brian o''brien 1898–1992 - National Academy of Sciences. of his work on demonstrating that the stiles-crawfordeffect ... slepian, theautovalvelightning arrester, which is still in .... the institute optical shopgrindingand polishing the flats on ... equipment (he had studied optics in rochester himself) his.

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