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 the mold release silicones, the mold release polyurethanes, the films or projections of Kevlar or derivatives, {HEAD ~ the film} or projections of {TAIL ~ aramid} or derivatives, and a combination thereof 
of
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 the mold release silicones , the mold release polyurethanes , the films or projections of Kevlar or derivatives , { HEAD ~ the film } or projections of { TAIL ~ aramid } or derivatives , and a combination thereof
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