Method of fighting against eutrophication of surface waters
PL254631A1
Method of preparing and reclaiming filter beds and theirarrangement in a water treatment filtering tank in particular for decarbonized and/or potable water
PL254087A2
Method of and apparatus for measuring hydrostatic pressure of liquids
PL252111A1
Apparatus for continuously determining odour of water
PL250489A2
Method of and apparatus for conditioning water in small double-well water intakes in particular rural ones
PL250176A2
Water aeration apparatus
PL250049A1
Viscosity measuring method
PL249733A2
Device for capping and decapping small bottles
PL248842A2
Apparatus for measuring pressure in an open filter bed
PL248164A2
Apparatus for measurement of changes of water level
PL247634A2
Probe for measurement of liquid level by means of hydrostatic-pneumatic method
PL236830A1
Method of treatment of industrial liquid wastes
PL236829A1
Method of treatment of sewage and industrial liquid wastes
PL236767A1
Waste storing method
PL234099A1
Method of solidification of sewage and liquid municipal and industrial wastes
