... kinds of gas and oil well operations such as logging, perforation, coring, etc. Ⅱ Performing CriterionWe produce according to the company standard ... ×1.123-conductor 8mm PP insulation, outer shielding EM able(perforation only)19W3FP-11.83×1.123-conductor 11.8mm F ... insulation, outer shielding EM cable(Perforation only)20W7FP-11.87×0.567-conductor 11.8mm F ...