|
HU1000246D0
|
|
Process and installation for biological waste water treatment
|
|
US5227054A
|
|
Filling body biological units and cooling towers
|
|
HUT40973A
|
|
Apparatus for purifying waste waters first of all communal, agricultural or industrial waste waters with organic impurities
|
|
HU206461B
|
|
Apparatus for gravitational separating fluids
|
|
HUT34935A
|
|
Contact cell sewage purifier
|
|
HUT36431A
|
|
Multiple-disc device for treating liquids
|
|
HU185894B
|
|
Apparatus for treating fluids
|
|
HU180771B
|
|
Apparatus for treating fluids with basin of radial bypass of round or polygon from
|
|
HU177213B
|
|
Mechanical surface aerating apparatus of vertical axle
|
|
HU175475B
|
|
Biological process for cleaning vaste waters containing organic pollution
|
