{HEAD ~ A device} for the quantitative analysis of debris 1, wherein {TAIL ~ said conveyor belt} is provided with containment sidewalls , integral thereto and placed on both sides along their whole length, and defines an upper or debris collection surface and a lower surface 
{ HEAD ~ A device } for the quantitative analysis of debris 1 , wherein { TAIL ~ said conveyor belt } is provided with containment sidewalls , integral thereto and placed on both sides along their whole length , and defines an upper or debris collection surface and a lower surface
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