a. 装甲的

[ adj ]
covered with heavy steel
<adj.all>
armor-plated vehicles

Armor-plated \Ar"mor-plat`ed\, a.
Covered with defensive plates of metal, as a ship of war;
steel-clad.

This day will be launched . . . the first armor-plated
steam frigate in the possession of Great Britain.
--Times (Dec. 29, 1860).

armor-clad \armor-clad\ armor-plated \armor-plated\
armour-plated \armour-plated\ armour-clad \armour-clad\adj.
1. 1 protected with a covering of armor.

Syn: steel-plated.
[WordNet 1.5]