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US3395893A
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Hydraulic spooling device
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|
US3445749A
|
|
Compound wound direct current generator having a split shunt field winding
|
|
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|
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Device for stabilizing the hook swing of a crane boom
|
|
US3424963A
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Generator fed varying voltage motor control system for cranes with motor field control during lowering
|
|
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Cargo cranes
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Level luffing attachment for cranes
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Unicontroller system
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|
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Horizontal boom unloader
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|
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Man hoist
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Crane propelled drive
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Clutch for hand power winches
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|
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Rotatable derrick
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US2187909A
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Yarder mounting
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