under water rig

例句：

1. 1. The diver used an underwater rig toexplore the wreckage.
   潜水员使用水下设备探索沉船残骸。
2. 2. The researchvessel was equipped with advanced underwaterrigs for deep-sea exploration.
   研究船配备了先进的水下设备，用于深海探索。
3. 3. The engineerhad to repair the underwaterrig before it could be usedagain.
   工程师必须修理水下设备，才能再次使用它。