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Air motivated conduit prover apparatus

Hydraulic and earth engineering – Miscellaneous
Patent

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Anchor drilling unit

Hydraulic and earth engineering – Miscellaneous
Patent

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Apparatus and method for replacing in-ground elevator...

Hydraulic and earth engineering – Miscellaneous
Reexamination Certificate

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Apparatus and method for sequential batch anaerobic composting o

Hydraulic and earth engineering – Miscellaneous
Patent

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Apparatus for automatic bolting in rock reinforcement

Hydraulic and earth engineering – Miscellaneous
Patent

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Apparatus for disposal of toxic and radioactive waste

Hydraulic and earth engineering – Miscellaneous
Reexamination Certificate

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Apparatus for feeding cement material into a drill hole for ceme

Hydraulic and earth engineering – Miscellaneous
Patent

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Apparatus for forming long and short holes and setting rock bolt

Hydraulic and earth engineering – Miscellaneous
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Apparatus for forming narrow drainage trenches

Hydraulic and earth engineering – Miscellaneous
Patent

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Apparatus for inserting prefabricated vertical drains into the e

Hydraulic and earth engineering – Miscellaneous
Patent

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Apparatus for making up threaded pipe joints into a pipeline

Hydraulic and earth engineering – Miscellaneous
Patent

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Apparatus for screening and spreading bedding material in a ditc

Hydraulic and earth engineering – Miscellaneous
Patent

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Apparatus for setting and removing tunnel casing rings

Hydraulic and earth engineering – Miscellaneous
Patent

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Apparatus for storing a concrete feeding hose in a rock bolting

Hydraulic and earth engineering – Miscellaneous
Patent

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Apparatus for supporting and erecting supporting means for suppo

Hydraulic and earth engineering – Miscellaneous
Patent

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Area earthquake defense system

Hydraulic and earth engineering – Miscellaneous
Reexamination Certificate

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Automated temporary roof support, bolter and method

Hydraulic and earth engineering – Miscellaneous
Patent

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Automatic roof bolting system for mines

Hydraulic and earth engineering – Miscellaneous
Patent

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Block laying machine

Hydraulic and earth engineering – Miscellaneous
Patent

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Bolt delivery system

Hydraulic and earth engineering – Miscellaneous
Patent

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