拉线受力T=18kN,拉线棒采用A3F钢的允许拉应力160MPa,拉线棒最大使用荷载时的安全系数K=2.5,此拉线棒的直径为( )cm。
选项:
A:1.89$;$2.14$;$2.76$;$3.07
B:1.89$;$2.14$;$2.76$;$3.07
C:1.89$;$2.14$;$2.76$;$3.07
D:1.89$;$2.14$;$2.76$;$3.07
发布时间:2024-06-15 20:57:10