main crosscut

例句：

1. 1.The main crosscut of the tunnel is 20 meters wide.
   隧道的主要交叉面宽20米。
2. 2.The main crosscut of the road was damaged during the storm.
   暴风雨期间，道路的主要交叉面受损。
3. 3.The engineers had to make a new main crosscut for the construction.
   工程师们不得不为建设制作一个新的主要交叉面。