luffing-jib crane

例句：

1. 1.The engineer was able to lift the heavy machine with ease using a luffing jib crane.
   工程师能够轻松地使用吊索式起重机举起这台重机器。
2. 2. The construction crew used a luffing jib crane to move the heavy equipment across the site.
   建筑工人使用吊索式起重机将重型设备从工地移动到另一个地点。
3. 3.The luffing jib crane was essential for the successful completion of the building project.
   吊索式起重机对于完成建筑项目的成功至关重要。