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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.1938年的秋天，在沂蒙山深处一个叫马牧池的小山村里，于大娘和丈夫李忠厚带着一家人正操办着二儿子继成的婚礼。看着幸福的小两口，于大娘的大儿媳他大嫂不禁想起了自己当年新婚之夜丈夫李继长逃婚而去。村里的二流子二孬跑来告诉大家来兵了，村里人惊慌失措的跑到了山沟里藏了起来。The children of migrant workers are also the treasures of their parents' hearts, the flowers in bud and the expectations of the country's future. However, their environment and understanding education have to make people worry about their future. Migrant workers and their children deserve respect and equal treatment. Schools for children of migrant workers also need more social attention, government support and help from you, me and him.Telecommunications嗯，好吧，我等会儿就去看。许许多多的魏军以为汉军正在对岸一筹莫展，因此很是放心，魏王豹也因为有事情返回都城去了。