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THANK YOU FOR VISITING MY CHANNEL. DON'T FORGET TO PRESS THE LIKE AND SUBSCRIBE BUTTON. TO SIMPLIFY AND SPEED UP THE INSTALLATION OF CONCRETE BLOCK, IT IS BETTER THAT THE CONCRETE INTERLOCKING SPECIMENS BE FILLED TOGHETER WITH THE CONCRETE BLOCK TO BE INSTALLED. BESIDES THAT, BRICK WALLS WILL BE STONGER, BECAUSE THE SOLIDS BETWEEN THE SPECIMENS ARE SOLID.