they used to circumambulate the perimeter wall. 他们以前常绕外围墙而行。
With the anti-skid chains the vehicle wheel circumambulate the inside wheel from the lower part, and then open the side of anti-skid chain of the insurance screws and Connect (such as left 3). 二、将防滑链从汽车驱动轮的内侧下部绕过去,再将防滑链开口一侧的保险螺丝扣好(如左图三)。