... 1 3/3 6/6 8.7/10 12/15 18/20 - 26/35Number of cores:1, 2, 3, 3+1, 3+2, 3+3, 4, 4+1, 4+2, 5 and ... powerful resistance against chemical corrosion, heat resistance and Environmental stress resistance; Its structure is simple;The long period ... electric strength, mechanical strength, high-ageing resisting; Environmental stress resisting anti-chemical corrosion;Simple construction, using convenient and ...