Combined flushing rod and swivel for large diametral boring, pile-boring
HU0800047D0
Expandable roller bit
HU0700225D0
Waste-weir built on piles
HU0500234D0
Barrage for water-power plant
HU0100513D0
Method and apparatus for quick suppression of liberation of gases
HU9300930D0
Method and apparatus for making cast in place piles with several enlarged sections bored deeper than 50 meters and enlarged sections in productive layer range by boring wells using known and available in commerce apparatuses
HU910751D0
Magnetostatic degasing and deironing unit, mainly in midget water works
HU910689D0
Method for modifying dead driven well into thermal or water-producing well
HU910655D0
Sealing member for high pressure and temperature
HUT48329A
Apparatus for producing underground hot water
CA1225926A
Method of procedure for construction of drilled well, principally water producing well and well outfit for carry out the procedure
DD233155A1
Method for drilling fountains and device for carrying out the method
EP0177623A1
Method and apparatus for the establishment of, in particular, water producing drilled wells
HUT53190A
Catching device of driven-well drilling machine
HU188121B
Driven well, particularly water-producing one, cementing and sand inlet valve for driven well, pressure transmitting device for same, as well as method for forming driven well
