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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).该剧讲述了四个来自不同社会背景，抱有不同目的人，误打误撞走在一起，为了理想、尊严、自由和爱情，开启的一段艰辛波折、笑中带泪、励志时尚的创业之旅。　　武汉空袭、重庆空袭，刘长岭和高云天用不屈的斗志迎接日本咄咄逼人的攻势，在空战中高云天失去了一条腿，刘长岭小说和电视剧同时连载。少时，汪魁也带着几十西南军来了，却是玄龟等清南村的少年居多。NBC续订了芝加哥背景的三部剧《凤城火情》(续订第7季)、《芝加哥警署》(续订第6季)、《芝加哥医院》(续订第4季)。该剧以主要讲述了芝加哥51号消防站应急救援队的故事。这一群英勇的消费队员们包括：副队长Kelly（泰勒·金尼 饰）、队长Walter（伊默恩·沃克 饰）、急救员Gabriella（莫妮卡·雷蒙德 饰），对自己的工作十分忠诚、资深消防员Christopher（David Eigenberg 饰）、玩命消防员Matthew（杰西·斯宾塞 饰）、准消防员Peter（Charlie Barnett 饰）等。这群勇敢无惧的男女却义无反顾地冲进最危险的地方，每天都要和死神打交道，要在最紧张的时候做出最重要选择，每天都要面对自尊与自负的考验，工作的责任和压力给他们的性格带来了巨大影响......何员外皱眉骂道：要取快些，就半个时辰。