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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.电视剧《黎明前的抉择》由南京瑞星影视文化传播有限公司，江苏艺星影视文化传播有限公司， 江苏幸福蓝海中天龙影视传播有限公司联合出品。2014年5月6日晚已在天津卫视黄金档播出。这事整个京城人都知道，六少爷在公堂上都说了。星光灿烂剧照大虾因为送快递无意间卷入一场文物案中，要被人灭口，孙应男一直在保护他。大虾也在快递工作与危险之中渐渐成长。当孙应男因为身上的玉环成为犯罪分子的目标而遇到危险时……她就在秦大夫家吃了？黄豆点点头，继续低头奋战。