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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).至于后面要做的事，他就更管不到了。丢下他就往红椒这边来。　　“超人狗”的神秘起源其实来自于一次高科BBC America宣布续订《黑色孤儿》(Orphan Black)第五季，将是本剧的最终季。三年前与重案六组有过交锋的一暴力团伙重新浮出水面，但是这次由它衍生的新团伙却更加凶残。在误解中走马上任的陶非临时成为六组代理组长，已调任分局预审处工作的季洁也回到了六组，升任刑侦支队副支队长的郑一民，现身为分局法制处处长的杨震--六组的新老成员们重新收集证剧，刑警们以血的代价捍卫了正义、尊严、荣誉，破获了形形色色的重案，最终也将这个犯罪团伙一网打尽，以实际行动实践着警察的誓言。Pool.remove (conn);