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Plural completion of wells

E - Fixed Constructions – 21 – B
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Plural-part earth bit, and an improved bit head therefor

E - Fixed Constructions – 21 – B
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Plurally energized power tongs

E - Fixed Constructions – 21 – B
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Pneumatcal, mechanical merc containment skirt

E - Fixed Constructions – 21 – B
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Pneumatic drifter with replaceable foot pieces

E - Fixed Constructions – 21 – B
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Pneumatic drill

E - Fixed Constructions – 21 – B
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Pneumatic drill hammer

E - Fixed Constructions – 21 – B
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Pneumatic ground piercing tool

E - Fixed Constructions – 21 – B
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Pneumatic ground piercing tool with movable chisel head

E - Fixed Constructions – 21 – B
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Pneumatic hammer

E - Fixed Constructions – 21 – B
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Pneumatic hammer

E - Fixed Constructions – 21 – B
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Pneumatic hammer

E - Fixed Constructions – 21 – B
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Pneumatic hammer drilling assembly for use in directional...

E - Fixed Constructions – 21 – B
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Pneumatic hammer-auger earth boring apparatus

E - Fixed Constructions – 21 – B
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Pneumatic impact drilling tool

E - Fixed Constructions – 21 – B
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Pneumatic impact hammers for rock-crushing and pile-driving

E - Fixed Constructions – 21 – B
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Pneumatic impact piercing tool

E - Fixed Constructions – 21 – B
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Pneumatic impact tool

E - Fixed Constructions – 21 – B
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Pneumatic percussion device for making holes in the ground...

E - Fixed Constructions – 21 – B
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Pneumatic percussion hammer

E - Fixed Constructions – 21 – B
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