潮汐能的一个问题是维修水下设备比较困难。
One trouble with tidal power is the difficulty of servicing underwater installations.
水下管道干式维修系统的基本设备是一套大型水下干式舱。
The "Underwater Pipeline Dry Repair System" is a National "863" Hi-tech project.
水下管道干式维修系统的基本设备是一套大型水下干式舱。
The "Underwater Pipeline Dry Repair System" is a National "863" Hi-tech project.
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