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Carbon nanotube(CNT)yarns with adjustable diameters were manufactured by twisting CNT films with varied twists.Different from traditional CNT fibers,CNT yarns exhibited a larger diameter(423 μm)and a higher tensile force(1 988 cN).The results showed that CNT yarns with the twist angle of 35° exhibited the highest conductivity(886 S/cm)and the highest tensile strain(35％).