derrick boom

• 吊杆

derrick boom的用法和样例：

例句

1. Angle the boom arm to position the microphone precisely.
   调整话筒吊杆臂角度，准确定位麦克风的位置。
2. As a commercial diver in the offshore oil fields of the Gulf of Mexico, I was assigned to a job on board a derrick barge.
   我在墨西哥湾的一个海面油田做职业潜水员，一次被指派到一艘吊杆起重驳船上工作。