“U-boat”造句，怎麼用U-boat造句

When ship's crew is rescued by deep diving lifeboat, the key problem is how to find the position of life-saving platform accurately in order to joint with U-boat.

The U-boat packs were kept underwater and harried continually.

One night his ship, the Stork; pursued and rammed a U-boat in the darkness.

The Casablance Conference had proclaimed the defeat of the U-boats as our first objec tive.

In anti-U-boat warfare the air weapon was now an equal partner with the surface ship.

Here is the SMS Vulkan, sub tender for the North Sea U-boat fleet.