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Curved bore expanded to 570 mm over 75 m

Even carrying out relatively short HDD bores can be a pretentious challenge, as was the case in Issenbütten near Braunschweig in Germany. The contracor had to install a 400 mm protection pipe  for a 315 mm drinking water pipeline in a residential area over a length of only 75 m in a sharp S-curve using the HDD method.




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