flak jacket

heavy protective jacket reinforced with metal （衬有金属片的）防护衣; 避弹衣.

flaccid, flaccidity, flag, flag-day, flag-pole, flag-waving, flagellant, flagellate, flagellation, flagged, flagging, flagon, flagrant, flagrantly, flagship, flagstaff, flagstone, flail, flair, flak, flake, flakiness, flaky, flambe, flamboyance, flamboyant, flamboyantly, flame, flame out, flame-thrower, flamenco, flaming, flamingo, flammability, flammable, flan, flange, flank, flannel, flannelette,