The device 9 wherein the horizontal surfaces in contact during the relative slipping of said monoblock elements are coated with a material chosen from among {TAIL ~ the mold release silicones}, the mold release polyurethanes, {HEAD ~ the films} or projections of Kevlar or derivatives, the film or projections of aramid or derivatives, and a combination thereof 
The device 9 wherein the horizontal surfaces in contact during the relative slipping of said monoblock elements are coated with a material chosen from among { TAIL ~ the mold release silicones } , the mold release polyurethanes , { HEAD ~ the films } or projections of Kevlar or derivatives , the film or projections of aramid or derivatives , and a combination thereof
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