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1987-10-20
Method and system for enriching oxygen content of water
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1989-02-08
Method of and means for hydrodynamic mixing
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1988-09-21
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IL83880A0
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1988-02-29
Oscillating propeller type aerator apparatus and method
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1988-07-27
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1990-10-10
Method of composting
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1992-01-29
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1990-10-17
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1987-09-01
Method for the treatment of sewage and other impure water
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1990-04-04
Method of and arrangement for purifying contamied water
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1989-11-08
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1989-06-13
Method of undesirable gaseous components removal from water by means of aeration and recirculation
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1988-03-02
Method and apparatus of treating photoresists
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1989-12-13
Gas treatment method and apparatus
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1989-07-12
Means for vine's peronospore supression and method of efficient substances production
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1988-03-23
Method and apparatus of treating photoresists
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1988-02-24
Method of treating photoresists
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1989-07-12
Equipment for undesirable gaseous components removal from water on principle of through-flow aeration and recirculation
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1988-04-06
Process and apparatus for the biological denitrification of water
CS404486A1
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1989-05-12
Method of water removal from undsirable gaseous components by means of gradually water through-flow aeration
ZA88868B
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1988-09-28
Method and apparatus for the purification of water
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1990-11-14
Method and apparatus for the treatment of water
SU1389050A1
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1990-08-30
Method of treating alcoholism
ZA875739B
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1988-11-30
Method for the treatment of sewage and other impure water
PL261019A1
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1988-05-26
Method of and system for purifying and disactivating water