This technology of pipe repair looks confusing at first, but it's actually a method that avoids digging up the ground. A soft liner is pushed through one end of the pipe and comes out the other side. Workers first remove rust and clear blockages, then check the inside with an endoscope. A resin mixture is poured into a machine, pressed, and formed into a tube that stretches like an inflating balloon. Once placed into the pipe, it sets in about ten minutes. The excess is cut off, leaving a harden