Patent classifications
E
FIXED CONSTRUCTIONS
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E21
EARTH OR ROCK DRILLING; MINING
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E21C
MINING OR QUARRYING
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37/00
Other methods or devices for dislodging with or without loading
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E21C37/06
by making use of hydraulic or pneumatic pressure in a borehole
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E21C37/12
by injecting into the borehole a liquid, either initially at high pressure or subsequently subjected to high pressure, e.g. by pulses, by explosive cartridges acting on the liquid
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