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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.但是，还没有蹦几下，华夫人就被门槛绊倒了，摔了一个狗吃屎。大苞谷自从听见那一声玉米，就魂不附体了。　　都市写实爱情浪漫喜剧《感动她77次》为2017年创下口碑和票房佳绩的《原谅他77次》续集。Of course, I don't have to be responsible for guessing blindly.《黑道家族》是美国近年来颇受欢迎的一套反映黑手党题材的电视连续剧，在美国有很高的收视率，并且成为了近年来金球奖和艾米奖的获奖常客。 从1999年起开始在HBO电视台播出，一炮而红，久映不衰。该系列剧集目前已获得包括5座金球奖,17座艾美奖在内的74项各类大奖和173项各类提名。