To lay drainage pipes, a trench is first dug one or two stitches deep (and approx. 50-60 cm wide) with the garden spade and the spade. After the loose soil that the spade has not been able to absorb has been removed with a masonry shovel, also with a kind of flat drain laddle, the trench is brought to depth with the narrow drain spade. Finally, with the drain laddle, the bottom of the trench is finished very accurately and at the required slope, so that the pipes can be placed on it (see pipe layer); the worker is standing next to the slot. [MOT]
MOT V 91.0401