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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).Manual Focus (MF): Manually adjust the focusing mode, similar to the lens contraction and extension of SLR, so that the focus can be completely controlled by yourself.(1) Having obtained the first-class qualification for more than two years, and having no record of illegal practice within two years prior to the date of application;7. Decorator)何霆和黎章这一对老小现在就是这样。从这一季开始更换了片尾曲，体现出超人的进一步成长，要处理更困难的局面、对付更黑暗的敌人。One by one, the maids entered Chunhui Hall with all kinds of things in their hands and looked at those common or unusual things. Even if they were as bad-tempered as the princess of Shu, they felt a little more confident.