Patent classifications
E
FIXED CONSTRUCTIONS
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E02
HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
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E02B
HYDRAULIC ENGINEERING
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7/00
Barrages or weirs; Layout, construction, methods of, or devices for, making same
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E02B7/20
Movable barrages; Lock; or dry-dock; gates
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E02B7/40
Swinging or turning gates
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