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Pipe rehabilitation system and methods

Hydraulic and earth engineering – Miscellaneous
Patent

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Pivotal roof bolter and extendable rotatable protective canopy f

Hydraulic and earth engineering – Miscellaneous
Patent

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Plug for pier hole

Hydraulic and earth engineering – Miscellaneous
Patent

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Polymeric film with biocide

Hydraulic and earth engineering – Miscellaneous
Patent

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Portable wellhead and welder protector system

Hydraulic and earth engineering – Miscellaneous
Patent

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Portable wellhead and welder protector system

Hydraulic and earth engineering – Miscellaneous
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Pressure activated fluid retaining system and method

Hydraulic and earth engineering – Miscellaneous
Patent

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Process for effecting sealed sheet pile construction and device

Hydraulic and earth engineering – Miscellaneous
Patent

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Process for installating a tight crossing in the wall of a cell

Hydraulic and earth engineering – Miscellaneous
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