效率系数≥0.90,实测极限拉力时总应变≥1.0%

效率系数≥0.90,实测极限拉力时总应变≥2.0%

效率系数≥0.95,实测极限拉力时总应变≥2.0%

效率系数≥0.95,实测极限拉力时总应变≥1.0%