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Hinge joint of bottom-hole helical planetary hydraulic machine

E - Fixed Constructions – 21 – B
Patent

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Hinged base for shoring strut for use in construction and...

E - Fixed Constructions – 21 – D
Patent

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Hinged conductor casing for deviated driving and method...

E - Fixed Constructions – 21 – B
Patent

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Hinged drilling tool

E - Fixed Constructions – 21 – B
Patent

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Hinged jet pump, particularly for activating water or...

E - Fixed Constructions – 21 – B
Patent

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Hinged removable collar for oil drilling apparatus

E - Fixed Constructions – 21 – B
Patent

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Hoist pull down system for blast hole drill

E - Fixed Constructions – 21 – B
Patent

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Hold down apparatus for progressing cavity pump

E - Fixed Constructions – 21 – B
Patent

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Hold-down for well packers

E - Fixed Constructions – 21 – B
Patent

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Holder for a pick, and the combination of a pick and holder

E - Fixed Constructions – 21 – C
Patent

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Holder for holding a collapsed tubular

E - Fixed Constructions – 21 – B
Patent

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Holder for the attachment of cutters to mining and...

E - Fixed Constructions – 21 – C
Patent

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Holding device for rock breaking tool

E - Fixed Constructions – 21 – B
Patent

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Holding wrench for drill strings

E - Fixed Constructions – 21 – B
Patent

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Holding wrench for rock drilling machine and rock drilling...

E - Fixed Constructions – 21 – B
Patent

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Hole depth sensing

E - Fixed Constructions – 21 – B
Patent

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Hole digger

E - Fixed Constructions – 21 – B
Patent

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Hole opener and casing setter

E - Fixed Constructions – 21 – B
Patent

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Hole opener for earth boring

E - Fixed Constructions – 21 – B
Patent

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Hole opener with improved rotary cutter mounting

E - Fixed Constructions – 21 – B
Patent

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