Here is the port side view of the aft ballast tank showing a closer view of the vent valve and tubing.
这里是港口方面鉴于对尾部压载水舱展示了更紧密的看法通风口的阀门和油管。
2
Finally introduced including the main control console, the ballast work interface operation through the operating instructions of some pumps and valve which used during exploiting the software.