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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).想想葫芦哥哥跟淼淼团聚的情形，他嘴角漾起一点微笑，心里暖暖的，感动莫名。她自己也不禁挺了挺胸，神情肃穆地看着军营。　　在地球上存在着一个人类所不知的地下世界——印内世界，那里有驾驶着巨大蜘蛛进行战斗的正义勇者蜘蛛骑士！少年亨特·斯蒂尔依据祖父的日记去冒险，不料在一个金字塔中被传送到印内世界。在那里，图谋征服印内世界的昆虫军团因塞克特，和与他们相对的蜘蛛骑士正展开这激烈的战斗。印内世界的精灵预感到亨特·斯蒂尔是救世主，而引导他来到印内世界，可是精灵的力量被印内世界的支配着封印了，必须找到4个被封印的钥匙才能恢复精灵的力量。亨特·斯蒂尔和他的朋友怎样才能拯救印内世界呢，故事由此展开。　　好景不长，海伦的父亲对唐和女儿的关系十分不满，在他的眼中，唐只是一个一事无成的浪荡儿而已。感情遭到否定的汤再次陷入了酗酒的危机中，甚至动起了自杀的念头。面对心灰意冷的爱人，海伦能否再一次将唐从死亡边缘中解救回来呢