DE3569098D1
(en )
1989-05-03
Apparatus for the aeration of waste water or similar matter in aeration tanks
GB2196633B
(en )
1991-02-13
Method of producing porous material having open pores
EP0540549A4
(en )
1993-07-14
Formation of porous materials
GB2282593B
(en )
1997-12-03
Process for producing concrete constructions having water permeability
ZA902384B
(en )
1991-03-27
Tank construction and method of manufacture
AU567387B2
(en )
1987-11-19
Aeration of sewage under layer of sludge foam
EP0450615A3
(en )
1993-02-03
Method of producing porous vitrified grinder
PL293680A1
(en )
1992-09-07
Method of making porous plates for use in aeration and ozonization of water reservoirs
PL279997A1
(en )
1989-12-11
Method of making porous plates for aeration and ozinization of water reservoirs
GB2209339B
(en )
1992-01-15
Method of producing porous material having open pores
JPS6418495A
(en )
1989-01-23
Waste water treating tank and method of treating waste water
PL286479A2
(en )
1991-01-28
Method of manufacturing porous inserts for fine-bubble sewage aerators
GB2249007B
(en )
1994-12-14
Fishing float apparatus and method of using same
CS303290A3
(en )
1992-01-15
Device for aerating water making use of fine bubbles
GB2237565B
(en )
1992-09-30
Aeration of sewage
PL271130A1
(en )
1989-09-18
Method of making porous bodies for fine-bubble aeration of liquids
HU9301904D0
(en )
1993-11-29
Method for aeration of fluid in basin
PL260556A3
(en )
1988-05-12
Method for manufacturing porous plates for aeration and ozonisation of water tanks
PL271210A1
(en )
1989-09-18
Method of obtaining water of improved quality from any water reservoir and/or water course
ZA933452B
(en )
1994-06-14
Method of treatment of recreational water
DE3479586D1
(en )
1989-10-05
Porous material having open pores and method of producing it
ZA892743B
(en )
1992-07-29
Tank construction and method of manufacture
PL296863A1
(en )
1994-06-13
Method of obtaining foamed concrete
CS740587A1
(en )
1989-03-14
Method of biologically pure water preparation
CA2188852A1
(en )
1997-06-08
Process for hardening porous soil and rendering it impervious to water