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At that tail of the warhead, the drag armour-piercing firebomb is filled with a drag agent and a fireagent, Under the pressure of propellant propelling warhead, it will spontaneously ignite to produce open flame, So it can break through the oil drum and ignite or detonate the gasoline. However, the old-fashioned traced armour-piercing firebombs have obvious trajectories due to traced light when they are launched. Therefore, it is very easy to expose oneself while pointing targets to friendly forces. Therefore, the new tracer armour-piercing firebombs now equipped all start to burn and emit light only after the projectile flies out of the muzzle for a certain distance (the generally set safe distance is 100 meters, which makes it impossible for the enemy to judge the firing position with tracer ammunition, while targets within 100 meters do not need to be indicated by tracer), The principle is generally to ignite the tracer and combustion agent carried by the projectile by accumulating the heat generated by the warhead's friction with the air after flying for a certain distance to a certain extent.III. Handling Methods尹旭问话，苏角恭敬回答。美版生人勿进是2010年马特·里夫斯执导的美国电影。影片中欧文是一个孤独的并且经常受人欺负的12岁小男孩，他的新邻居是一个神秘的年轻女孩艾比，他们做了朋友。恰逢周围发生了一系列令人毛骨悚然的事件，欧文了解到，他的新朋友是一个吸血鬼，但是他们之间友谊的力量却远远强大过恐惧。但原本平静的小镇接连发生了几起命案，这一切好像都与艾比有关，小镇迅速被死亡的阴影笼罩。原来是艾比的“父亲”在帮艾比找人血，他将人残忍的杀害榨干其血给艾比喝，但在一次事件中艾比的“父亲”意外毁容，在他生命的最后一刻他把自己的血献给了艾比(3) If it is not possible to install the mast light or ring white light on the centerline of the ship's head and tail, the mast light or ring white light of a motor boat of less than 12m in length may be displayed off the centerline, provided that its side lights are combined into one and shall be installed on the centerline of the ship's head and tail, or as close as possible to the centerline of the mast light or ring white light.美国旧金山，生活着一位人到中年、单身离异的美籍华人妇女琳达。十三年前，她从中国领养了一个女儿——娜娜。但天有不测风云，娜娜患上了急性淋巴细胞性白血病，琳达毅然辞去工作，与老父亲一起变卖房屋，来到中国寻找娜娜的亲生父母，谋求骨髓移植。会说英语的出租车司机刘平凡，带着两人开始了在中国的千里奔波。在当地派出所和医院的帮助下，他们好不容易找到娜娜的亲生母亲雪梅。功成名就的雪梅排除众议与女儿相认，但她的骨髓与女儿不匹配。于是他们又找到娜娜的亲生父亲吴江，并不知道自己有一个女儿的吴江顶住社会和家庭的压力，使娜娜终于得救。雪梅和吴江都希望从美国养母琳达手里要回女儿的抚养权，历经几起几落，琳达终于获得了娜娜的抚养权，同时还收获了与刘平凡曲折而又真挚的爱情。最后，琳达带着爱女娜娜登上了飞往旧金山的飞机[4] 。