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陈启在门上面敲了敲。One last thing on this subject, The 7.62 mm traced armour-piercing firebombs fired by the 81-1 family, Although the name is a little long, But compared with ordinary munitions, The difference is still well understood: Tracing and burning are simple, Is to add two corresponding drugs, The armor piercing is to replace the steel core behind the bullet's brass back armor (also known as bullet head) with a harder tungsten alloy core with stronger penetration to hard targets. The latter is also the tail-stabilized shelling penetrator used on the third generation of modern main battle tanks (abbreviation: APFSDS) is one of the two main materials (the other is the notorious, highly radioactive depleted uranium penetrator core, The user country is mainly the United States, while China mainly uses tungsten alloy penetrators, Less pollution and better performance, The United States does not need to. First, the United States does not pass the standard of tungsten treatment technology. Far from the level of our country, Secondly, the United States is a tungsten-poor country. It also wants to fully use tungsten alloy bombs, But it can't be used, But as a nuclear Power, There is a lot of depleted uranium as nuclear waste, so depleted uranium is selected as a substitute. As for tungsten alloy and depleted uranium, after putting aside the key additional condition of radioactive pollution, the pure question of who is better in armour-piercing performance is not directly related to this article, so it will not be described in detail).在很久很久之前，人们还相信神明和祈祷的那个时候，有讹神降临人间，教化讹术套路。讹神传人聚落而居，谓之欢喜村。 很多年之后，江湖传言，欢喜村有惊人宝藏，悍匪听闻蠢蠢欲动，欢喜村陷入毁灭危机，我们的故事就从这里讲起……至于另一个同事，那个带着大框眼镜的苏小梨，顾小玉瞥了一眼。素谨责备地问：怎么才来？马三喘气道：永安堂……没人，去……去家里……叫的。