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СБПу 27x2x1
ТУ У 31.3-00214534-008-2001
Signal blocking cables with copper conductors, with polyethylene insulation, in thickened polyethylene sheath
* CONSTRUCTION:
1Copper conductor  
2Polyethylene insulation  
3PET film winding  
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Polyethylene inner sheath  
5Polyethylene outer sheath  

Notes:

*
Pair twisting in the layer of core on the picture not shown.

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Manufacturing of cables with inner sheath of PVC-compound is possible