A銆佷笌鎺ュご閰嶅悎鏃迭/span>




濡傦細褰撳寰勫昂瀵镐负1000mm鏃迭br/>        绾挎灏哄L2 = 1000-(2.5+49) x 2 = 897 (mm)


B銆佷笌鍦拌剼閰嶅悎鏃迭/strong>