Patent classifications
E
FIXED CONSTRUCTIONS
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E02
HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
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E02D
FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
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3/00
Improving or preserving soil or rock, e.g. preserving permafrost soil
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E02D3/10
by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
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