underwater fittings

例句：

1. 1. The submersible fittings are designed to withstand the pressure of deep water.
   这些水下接头设计用于承受深海的压力。
2. 2. The underwater connectors ensure a secure connection between the equipment and the seabed.
   水下连接器确保设备与海底之间的安全连接。
3. 3. The installation of these underwater fittings is crucial for maintaining the integrity of the pipeline system.
   安装这些水下接头对于保持管道系统的完整性至关重要。