self-propelled antiaircraft artillery

例句：

1. 1.The self-propelled antiaircraft artillery is an essential pieceof equipment for our military.
   自走式防空炮是我们军队必不可少的装备。
2. 2. The self-propelled antiaircraft artillery has proven to be highly effectivein combating enemy aircraft.
   自走式防空炮在战斗中证明是非常有效的。
3. 3. Theself-propelled antiaircraftartillery has been used extensively invarious war zones around the world.
   自走式防空炮在世界各个战区都有广泛应用。