GB2209686B
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1991-12-11
Water repurification method and apparatus
IL82013A0
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1987-10-20
Method and apparatus for electrolyzing water
GB2190603B
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1990-03-07
Method of and apparatus for removing impurities from a liquid
DE3466667D1
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1987-11-12
Water treatment method and apparatus
GB2198123B
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1990-10-03
A method of and apparatus for treating waste water
GB2213249B
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1991-09-11
Water warming method and apparatus therefor
GB2162164B
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1988-10-12
Water treatment method and apparatus
GB2192975B
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1990-08-01
Apparatus and method for insulating a water heater
PL267282A2
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1988-07-07
Method of draining water from a tank and apparatus therefor
EP0429661A4
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1991-12-11
Method of water treatment
JPS6418495A
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1989-01-23
Waste water treating tank and method of treating waste water
GB2164677B
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1988-07-13
Method and apparatus for treatment of a structure
GB2210869B
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1990-11-14
Method and apparatus for the treatment of water
GB8929341D0
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1990-02-28
Method of water treatment
JPS57128141A
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1982-08-09
Method and apparatus for dilating clogged part of vessel
PL253995A2
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1986-04-22
Apparatus for selectively draining off water from tanks of varying water level therein
JPS57137534A
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1982-08-25
Method and apparatus for opening hole of water tank
EP0230894A3
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1989-12-27
Method of an apparatus for water treatment
ZA88868B
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1988-09-28
Method and apparatus for the purification of water
PL265541A1
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1988-11-24
Method of and apparatus for treating water
PL243686A1
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1984-06-18
Method of removing water from a fibrous suspension and apparatus therefor
CS953987A1
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1989-08-14
Method of sulphate oions removal from water
CS249487A2
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1990-11-14
Method of magnetohydrodynamical water treatment
IL82161A0
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1987-10-30
Method and apparatus for water irrigation
IL78887A0
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1986-09-30
Method and apparatus for water irrigation