引信,对各种弹丸都必不可少,它是引爆弹丸的一种专门装置。控制弹丸碰上目标炸的叫碰炸引信。弹丸接近目标到一定程度时炸的叫近炸引信。实弹射击或投掷时,由于多因素影响,刚好碰上目标的几率一般很小,比如炮弹打飞机直接碰上的几率还不到1%。但随着弹丸威力的不断提高,并非一定要碰上,像空-空导弹若威力圈直径一公里,只要敌机进入此 Fuze, essential to all kinds of projectiles, it is a special device to detonate projectiles. Control the projectile hit the target bomb called bombing fuze. Projectile close to the target to a certain extent, the bomb called the near-fuze. Live fire or throwing, due to many factors, just hit the target the chances are generally small, such as the probability of shells hit the aircraft directly to less than 1%. However, with the continuous improvement of the power of the projectile, it is not always necessary to run into it. If an air-to-air missile is one kilometer in diameter, as long as the enemy plane enters this