| http://www.w3.org/ns/prov#value | - Belts 47a and 47b are made of a conducting material, such as polished stainless steel and the charge on rolls 35 and 36 and 37 and 38 are imparted to belts 47a and 47b, respectively, whereby a field is formed between the surface of belts 47a and 47b and the conducting layers 21 and 23, respectively, of sandwich 15.
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