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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).杨长贵见到海瑞的态度后，心思也平静了许多。全球突然出现了很多来自宇宙巨大的“入口”，世界一片混乱、陷入危机。这些扭曲现实的入口为何出现，它们的另一端是？边塞长大的太尉之女桑祈为了完成哥哥遗志，因一场荷包之约，进了国子监成为史无前例的唯一女弟子，跟清冷傲娇司业晏云之从师生斗法到情投意合，携手读书习武，查旧案锄奸佞，最终阻止了桑祈的青梅竹马、腹黑公子卓文远的阴谋，保家卫国，并实现了国子监广开门庭男女平权读书的理想。(1) We are now writing a work log every day, writing down the daily work records and the problems that have occurred and solving them truthfully, and writing down the weekly work summary.