A protective mat for the pavement area surrounding an open manhole comprises a bottom layer of petroleum and contamination impervious preferably polyethylene sheet material laminated to an upper fibrous mat sheet layer preferably comprising cotton fibers bonded together to form a porous liquid absorbent layer.

Una estera protectora para el área del pavimento que rodea una boca abierta abarca una capa inferior del material impermeable de la hoja del petróleo y del polietileno de la contaminación preferiblemente laminado a una capa mat fibrosa superior de la hoja que abarca preferiblemente las fibras del algodón enlazadas juntas para formar una capa absorbente líquida porosa.

 
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< Image supply apparatus, image output apparatus, control apparatus therefor, and image forming apparatus incorporating them

> Integrated circuit device made secure by means of additional bus lines

~ 00052