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Borehole tubing expansion

E - Fixed Constructions – 21 – B
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Borehole tubing expansion using two expansion devices

E - Fixed Constructions – 21 – B
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Borehole ventilation sealcover

E - Fixed Constructions – 21 – B
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Borehole, as well as a method and an apparatus for forming it

E - Fixed Constructions – 21 – B
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Boring apparatus

E - Fixed Constructions – 21 – B
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Boring apparatus

E - Fixed Constructions – 21 – B
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Boring apparatus

E - Fixed Constructions – 21 – B
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Boring apparatus

E - Fixed Constructions – 21 – B
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Boring apparatus capable of boring straight holes

E - Fixed Constructions – 21 – B
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Boring auger for horizontal earth boring machine

E - Fixed Constructions – 21 – B
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Boring device for lining material in branched portions of...

E - Fixed Constructions – 21 – B
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Boring devices

E - Fixed Constructions – 21 – B
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Boring head

E - Fixed Constructions – 21 – B
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Boring head

E - Fixed Constructions – 21 – B
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Boring head for a subsurface soil-boring apparatus

E - Fixed Constructions – 21 – B
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Boring head with new protection hood

E - Fixed Constructions – 21 – B
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Boring tool

E - Fixed Constructions – 21 – B
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Boring tool for radial enlargement of a cylindrical...

E - Fixed Constructions – 21 – B
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Boring tool suspension method

E - Fixed Constructions – 21 – B
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Boronized drill bit cutters and methods

E - Fixed Constructions – 21 – B
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