telescopic derrick

例句：

1. 1.The engineer used a telescopic derrick to lift the heavy equipment.
   工程师使用望远镜式吊车来提升重型设备。
2. 2.The construction crew was using a telescopic derrick to move the beams into place.
   施工队伍正在使用望远镜式吊车将梁移动到位。
3. 3.The engineer had to use a telescopic derrick to reach the top of the building for repairs.
   工程师不得不使用望远镜式吊车爬到建筑顶部进行修理。