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Gas theory: Flame retardant releases incombustible gas at high temperature and dilutes the combustible gas released from combustion to below the combustion concentration, which has the effect of gas dilution. The dilution of different gases is in the following order: N2 > CO2 > SO2 > NH3.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).《育儿大师》是贵州卫视新年巨制的亲子育成类真人秀节目。家长带着宝宝一起入住健康舒适的宝贝之家，由特邀的权威育儿专家全程陪伴，对问题宝宝或问题爸妈进行封闭式观察和引导，为家庭提供定制化育儿辅导与帮助。节目集结了妇儿健康、心理咨询、中医、营养等专家，打造“自组团队与家IP”。北宋晚期，朝廷内忧外困，武林动荡，夜叉门趁机作乱。京都聚义钱庄遭人洗劫，掌柜钱无用在密室中被杀人焚尸，凶手疑于少林有关。少林顽逆弟子李少白奉命助官府办案，却与开封总捕狄八方不和，冲突不断。 
　　另一方面又有人接连遇害。李少白察觉凶手的本意并非谋财，而真凶仍在钱庄之中。她愣愣地停住马，站在大街上，看着那群人顶着风雪慢慢走近，眼光掠过一张张脸孔，渐渐跟记忆中的孙铁等人一一对上号，禁不住泪水就涌满眼眶。项伯并未直接回答：羽儿，亲自打开看看就知道了，或许会有意想不到的惊喜。