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Derrick crane

Traversing hoists – Having horizontally swinging boom or bridge – And vertically swinging
Patent

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Device for lifting crane boom

Traversing hoists – Having horizontally swinging boom or bridge – And vertically swinging
Patent

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Device for locking slewing portion of cargo crane

Traversing hoists – Having horizontally swinging boom or bridge – Having trolley thereon
Patent

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Device for slewing the column of a crane

Traversing hoists – Having horizontally swinging boom or bridge – And means to swing boom horizontally
Reexamination Certificate

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Device for use in welding reinforcement members to panel plates

Traversing hoists – Having horizontally swinging boom or bridge – Having fluid ram directly actuating load cable or sheave...
Patent

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Directional control system for a gantry type crane

Traversing hoists – Having horizontally swinging boom or bridge – Having fluid ram directly actuating load cable or sheave...
Patent

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Dragline modular swing drive unit

Traversing hoists – Having horizontally swinging boom or bridge – And means to swing boom horizontally
Patent

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Dragline rotating frame structure

Traversing hoists – Having horizontally swinging boom or bridge – And means to swing boom horizontally
Patent

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