PROBLEM TO BE SOLVED: To stack easily and economically one kind of concrete blocks. ;SOLUTION: The shape of the front face is a laterally long rectangular form. This concrete block is constituted of a front face board 2 provided with recessed grooves 4 at a plurality of longitudinal positions of the upper side and a plurality of projected legs 3 at the back face of the front face board and at positions where the recessed grooves are formed. The width of the front end of the leg 3 is made to fit to the recessed groove 4, and the height of the part is made higher than the depth of the recessed groove. And further, a butt step 7 is provided at the front end of the upper side of the leg.;COPYRIGHT: (C)2000,JPO
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