C878 Qin Guan will Take Care of It

In a basic submarine training, there's one thing that's urgent floating.

From the bottom of the water, the air was compressed from the tank, and then rushed out at a very large angle. If the submarine was fast enough, even the front half of the hull would be able to jump out. And then it would fall down again. This scene was extremely spectacular. Just like a flying fish.

However