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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).In addition, the structure of the mind map is divergent, which is very beneficial to the divergent thinking and creative thinking of the brain, and it is also easy to add new content. However, if new content is added in the middle of the two lines of text notes, the traditional linear notes will become dense, and even the lines will be introduced everywhere, which is neither good-looking nor conducive to summary.关中分封之后，魏豹从魏王变成了西魏王，封地也从原来的中原之地变成了河东一角。焚书坑儒竟然是为了消除穿越者的影响。电视剧《战金岭》由曹炳琨、马丽、武强等实力派演员领衔主演，正在北京怀柔景区紧张的拍摄中，讲述了一个足智多谋的党员诗人在穷山恶水的绝境中，历经两段凄美的旷世绝恋，智斗恶煞匪军和日本忍者团，最终与国民党在力量与信仰的对抗中胜利寻得黄金矿脉的故事。缠绵悱恻的爱情、惊心动魄的夺宝冒险奇遇、充满传奇色彩的英雄人物以及超强热播剧制作班底，令《战金岭》一开拍便吸引了各方关注。在一所艺术学院表演系一名二年级的学生蔺子默总是被比自己第一年级的花痴学妹宫小略纠缠，蔺子默在百般躲避中发现了自己的身世之谜和与宫小略的前世情缘。由于阴谋和爱情交织在一起，构成了千年前的一段迷情，前世身为魔界一族的宫小略无可救药喜欢上蔺子默，前世的情缘，今生注定纠葛。