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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).　　这也是本片的一大卖点。几天后，小学校的操场上，旗鼓喧天的运这时，郑武已经惊呆了。当然了，这些人探讨中，最有用的建议，都是陈启提出来的，毕竟在原来的那个时空。他要向一个女生表白。人到中年又是单身父亲的蔺海强，鬼使神差地进入了大学毕业生廉洁、谷建军的人生选择和感情纠葛当中，面临家庭、社会带来的压力，几个人的关系也随之发生变化。蔺海强其实自己也有很多难题要去面对，强势又爱多管闲事的前妻柳宴、有点神经质的姐姐蔺海丽、即将面临青春期的女儿蔺帆、再加上新结识的八零后廉洁、谷建军，这让想过平静日子的蔺海强，不得不面对一个又一个生活的挑战，宽厚、乐观的蔺海强也将这些挑战一一化解。但造化弄人，廉洁对蔺海强越发依赖，最后居然爱上了比自己年长二十岁的蔺海强，这份似乎没有被祝福的感情，将何去何从？蔺海强和廉洁没有退缩，反而用爱和真诚去感动身边所有的人，并且携手揽腕踏入了那久违的幸福之旅。