class b armor造句

The Class A steel was significantly more effective than the Class B armor used in earlier cruisers; 8-inch guns had to be within to penetrate the belt, as opposed to for the earlier armor . " Wichita " had a thick deck, which was immune to 8-inch fire inside.
Yet, these ships were also designed to limit weight and the complexity of construction, for instance incorporating extensive use of flat and straight metal pieces, and of Special Treatment Steel ( STS ), a nickel-chrome steel alloy that provided the same protective qualities as Class B armor plate, but which was fully structural rather than deadweight.
It's difficult to find class b armor in a sentence. 用class b armor造句挺难的