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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).今日全是你大嫂在张罗。Here, the string str is converted into a date-time variable according to the format, which refers to the format of the date-time represented by the string str.在庄稼丰收的时候，小镇上举行了狂欢活动，突然，一阵琴声从钟楼最高处传了出来，那女孩又要开始唱歌了，她的歌声讲述了一段最荒诞的爱情故事……只要女主角出现，情况马上就会逆转，我们还是安安静静等着女主角出现。他已经清楚地意识到范文轲的下一个目标是父亲。The performance appraisal has been conducted from May to June. It is now the end of July, According to the regulations issued by the company, performance appraisal bonuses will be paid every month. But now the performance appraisal reward has not been clear, The cashier kept asking us, But we can't give any reply, And about the performance appraisal bonus how to distribute cashiers listen to other departments rumors more, I feel that we will not issue it if other departments issue it. Although I have repeatedly stressed that the performance appraisal is a company-wide appraisal, there should be a unified standard for distribution, and no one will issue what we do not have, everyone is not satisfied with my unclear explanation.