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Arrangement for driving a rotary tool
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Two axis centering system with oscillating photocells
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Water powered high speed motor
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High speed drill system
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Projection scope and positioning system
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Drill head guiding control for multiple drills
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Rectangular coordinate positioning system
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Water-rubber bearing high speed drill spindle
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Photoelectric two axis positioning system
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Work position programming and recording system using symbols on a transparent medium
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Two axis photoelectric positioning system including alternate axis activation of photocell
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