Method for supplying water to be filtered in the two-chamber open filter and the two-chamber open filter
PL405059A1
Drainage of soil bed open filters
PL392200A1
Two-pump diversified pumping plant and method of control of the two-pump diversified pumping plant
PL390637A1
Method for rinsing reservoir filters
PL389825A1
Method for filtering a well in the water-bearing rock, especially in the rock with a low filtration coefficient
PL383139A1
Water intake method from abyssal intakes and abyssal well
PL378911A1
Method for the control of the working medium temperature in a heat distribution centre and the heat distribution centre
PL378910A1
Method for the control of the coupling rate of hydraulic circuits, hydraulic system and the two-way distributor to carry out this method
PL340985A1
Pumping set, in particular for large pumping systems, method of selcting pumps to be used in such set and method of controlling operation of pumps in such set
PL339978A1
Method of controlling operation of pumps in a double-pump hydrophore-type pumping station
PL338662A1
Hydrophore pumping ssytem
PL338202A1
Double-pump pumping unit in particular that for compensating hydraulic losses
PL189569B1
Flanged joint for pipelines and their fittings
PL331970A1
Method of controlling rpm of a pump motor
PL330450A1
Method of and system for controlling temperature of heat-transfer medium in thermal energy transmission circuits
PL326402A1
Water purification station system
PL323775A1
Liquid-gas distributor
PL322911A1
Method of jointing together pipe sections by means of welded-on flat flanges and flanges used in that method
PL319667A1
Method of venting warm water supply systems
PL316884A1
Method of venting tanks and pipelines and vent therefor
