EROSION-PROTECTING SURFACE COVERING FOR LAYING OUT ON EARTH SURFACES EXPOSED TO WATER

摘要

squeezing together concrete blocks (1, 4) on a flexible mat (8) by means of a threaded rod through a nut (6) and (7) fixed on the circuit thereof can be recovered which can be lowered to the bed of the sea and protect it against the erosion.this recovery is to be secured, the lower block (4) below is concave, while the top of the upper block (1) is tapered to reduce resistance against the current. finally, the blocks (4) are hexagonal in shape so that it can be mounted on the conveyor (8) at an equal distance from each other.