High pressure pipe and device for making a hole in the ground with such high pressure pipe.
BE1004385A3
Device for moving a pipe lengthwise
BE1003865A3
Steerable BOORMOL.
BE1003502A6
Steerable BOORMOL.
BE1001450A3
Tunnelling machine with jet nozzle - has remote-controlled units on head selectively varying body shape
BE1001218A3
Detection device for boring head - has earth removing parts at end of flexible boring casing and series of direction sensitive detector and electromagnetic coil
BE1000483A5
Water well with electric pump - has combined seal and clamp for outlet pipe suspending pump