catalin
Digging a ditch requires a lot of man power and a lot of time, but this problem might have just been solved by the creators of the machine we can see in the video below.
This modified bulldozer has a track line that looks like a tank caterpillar track pulls the ground out, which is then evacuated to the side of the machine, leaving nothing but a perfect straight ditch after its work is done.
This machine can be very useful in building!