GB2193360B
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1990-09-26
Detecting leaks in plumbing systems
DE3464639D1
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1987-08-13
Sub-soil drainage piping
DK0580573T3
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1997-08-04
Device for excavation under water
NZ231284A
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1993-02-25
Roadway drainage grid device
GB8923598D0
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1989-12-06
Automatic water drain system
AU8096182A
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1982-09-23
Anchoring device in borehole
GB2217364B
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1992-04-08
Drainage device
YU2788A
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1991-02-28
Device for building draining system in unbinded soil at underground water presence
GB2208465B
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1991-07-10
Underground drainage
GB2254149B
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1994-10-19
Under water detection system
GB8901617D0
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1989-03-15
Surapubic flushing water drain
GB8303791D0
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1983-03-16
Vertical drain in soil
GB2253125B
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1995-01-04
Underground drainage
ZA895736B
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1990-04-25
Panels for subterranean water drainage
KR890016378U
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1989-08-19
Freeze prevention device for water meter
HU910434D0
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1991-08-28
Water conduit structure and method for its construction
HUT63912A
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1993-10-28
Method for draining water got into underground drift
GB2237170B
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1994-07-27
Ground water retention unit
BR6802123U
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1990-05-15
PROVISION INTRODUCED IN WATER DRAINAGE SYSTEM
BG42946A1
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1988-03-15
Underground water collection system
KR870012388U
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1987-08-04
Freeze prevention device for water pipes
GB9023118D0
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1990-12-05
Underground irrigation and drainage system
GB9021650D0
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1990-11-21
Underground irrigation and drainage system
HU9201132D0
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1992-08-28
Draining system for buildings and underground structures
ZA845761B
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1986-03-26
Sub-soil drainage piping