ungraded pole line

例句：

1. 1.The ungraded pole line was used to reinforce the structure.
   未分级的杆线被用来加固结构。
2. 2.The engineer carefully measured and marked the ungraded pole line for future use.
   工程师仔细测量并标记了未分级的杆线，以备将来使用。
3. 3. The ungraded pole line was crucial in supporting the weight of the building.
   未分级的杆线在支撑建筑物的重量方面至关重要。