构成 外径 SYV-50-1 50 7×0.1 0.27 0.87±0.05 1.40S 1.9±0.10 SYV-50-2-1 50 7×0.16 0.45 1.5±0.10 2.10S 2.9±0.10 SYV-50-2-2 50 7×0.18 0.68 2.2±0.10 3.10S 4.0±0.20 SYV-50-3 50 单芯 0.9 3.0±0.15 3.85S 5.0±0.25 SYV-50-5-1 50 单芯 1.37 4.6±0.20 5.50S 7.0±0.30 SYV-50-5-2 50 单芯 1.37 4.6±0.20 6.20D 7.8±0.30 SYV-50-7-1 50 7×0.75 2.28 7.3±0.25 8.50S 10.2±0.30 SYV-50-7-2 50 7×0.75 2.28 7.3±0.25 9.30D 11.2±0.30 SYV-75-2