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US2777671A
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Drilling apparatus
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US2721540A
|
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Automatic water valve for rock drills
|
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US2657709A
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Valve
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GB699051A
|
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Improvements in or relating to rotary impact tools
|
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US2661189A
|
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Centralizer
|
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US2610030A
|
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Drill cradle
|
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US2613646A
|
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Valve mechanism for pneumatic tools
|
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US2585486A
|
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Impact type clutch
|
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US2620195A
|
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Valve for pneumatic columns
|
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US2607441A
|
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Air line lubricator for pneumatic tools
|
|
US2494764A
|
|
Control mechanism for chucks
|
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US2575525A
|
|
Power operated screw stick screw driver
|
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US2565223A
|
|
Belt tightening and aligning mechanism for abrading devices
|
|
GB659738A
|
|
Improvements in or relating to an impact clutch for portable power-operated impact wrenches and like tools
|
|
US2585457A
|
|
Air line lubricator for pneumatic tools
|
|
GB646710A
|
|
Centrifugal governors for impact tools
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US2582873A
|
|
Flexible spindle for rotary power tools
|
|
GB631481A
|
|
Improvements in or relating to impact wrenches
|
|
US2450380A
|
|
Switch handle for portable electric tools
|
|
US2581033A
|
|
Axially offset, motor operated, impact-type wrench
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