aa defense造句

• Initially, light AA defense was provided by twelve triple-mount Type 96 AA guns.
• Light AA defense was handled by six quadruple, water-cooled, 46-K mounts fitted with superfiring over the rear main gun turret.
• Light AA defense was handled by ten quadruple, water-cooled, 46-K mounts fitted with 70-K guns with 1800 rounds per gun.
• A second overhaul of AA defense was made between 1944 and 1945, as the Navy had found 20 mm shells too light to stop Japanese " kamikaze " planes; this plus the higher approach speeds of these planes made these manually controlled guns obsolete.
• The ZSU-23-4 was intended for AA defense of military facilities, troops, and mechanized columns on the march; originally, the more powerful guns of " Yenisei " were judged to be effective at covering the inner dead-zone of Soviet surface-to-air missile systems despite the increased weight of the vehicle, but commonality prevailed.
• Changes in naval technology dictated other alterations as well : installation of air search radar sets and antennas; upgraded radio equipment; an armored fighter director cabin mounted on the main mast ( which in turn meant a heavier, sturdier mast to accommodate the cabin's added weight ); extra armoring for the bridge and fire control center; a new curved funnel cap to shield the fighter director cabin from smoke; replacing the single-mount 20mm AA guns with quadruple " Flakvierling " 38 guns ( with a corresponding increase in ammunition supply ) to improve overall AA defense; and additional bulges on either side of the hull to preserve the ship's stability under all this added weight.