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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).D > B enters the synchronized block, and since instance is not null at this time, it immediately leaves the synchronized block and returns the result to the program calling the method. E > At this point, thread B intends to use the Singleton instance, only to find that it has not been initialized, so an error occurs. Therefore, there is still the possibility of errors in the program. In fact, the running process of the program is very complicated. From this, we can see that it is more difficult and challenging to write programs especially in multi-threaded environment. We further optimized the program:屡考不中的秀才杜云腾（陈浩民饰）阴差阳错的被误认成为欢喜县县令，与知晓杜云腾底细的捕快麦亚堂（林子聪饰）上演了一场夺权大战，并与欲卧底在衙门的女山贼曹天娇（林源饰），冒牌神医后人华盈盈，以及自卑的武功高手小强等人组成欢喜县衙。在两种价值观的碰撞之下，杜云腾与麦亚堂斗得难分难舍，从官场斗到情场，两人也在不知不觉间被对方所改变。他们联手破获案件、整顿欢喜县、惩恶扬善铲平恶霸、修建学堂造福百姓，在这过程中他们发现并最终成功地挫败了一场巨大的阴谋。10. Click to download: Communications Department's electronic signature attachment. RAR, attachment 5, attachment 7, fill in and affix the official seal; Appendix 9, Signature; Attachment 10, in two copies, Party a shall fill in the name of the unit and affix its official seal.　　至此佟奉全与茹秋兰，莫荷间产生了连绵不断的情感纠葛！佟奉全为不让莫荷嫁给别人，违心为范五爷造了假画，并做局卖给了在琉璃厂的古董商蓝一贵。随后事发，蓝一贵抛店逃命，从此与佟、范结下了仇怨。[3 sets of special training programs for the simplest strength lifting]清军主力入关后，大清王朝定都北京。经过明末清初的战火摧残，华夏大地急需太平安宁。但就在顺治十八年，恶疾天花袭击皇宫，皇帝爱妃命丧黄泉，顺治皇帝痛不欲生，决意遁入空门。危急之际，孝庄太后力挽狂澜，下令改朱批，行蓝批，同时立下诏书：清顺治十八年正月初七，顺治皇帝龙御归天。公元1661年，在孝庄太后的扶植下，天花大病初愈、年仅八岁的爱新觉罗·玄烨登上了大清皇帝的龙座，称康熙皇帝。翌年改元康熙。