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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.感叹道：可见‘天网恢恢，疏而不漏，冥冥之中一切自有定数。2 出租的爱我不需要封地，不需要特权，只需要一个身份年过半百的管区民警李久平（李保田 饰）不想刑警同行那样干些追拿要犯的惊天事迹，相反他常年游走在街头巷尾，协调管区百姓处理鸡毛蒜皮的琐事，小偷小摸都可以算作大案了。平常人一个的李久平日常里也有许多要操心的事，在理发店混日子的儿子李小山和同院儿当模特的齐艳艳相恋，当爹的自然极力反对。引以为傲的女儿李小文在小提琴演奏时，邂逅了多年前的老街坊马志高。做股票生意的马对小文大献殷勤，而他糟糕的经济状况也不可避免对小文产生影响。患脑血管梗塞的父亲李大山去世，孝子李久平哀伤不已，孩子们的爱情婚事更令他牵肠挂肚。也就是西楚国还是不放心自己。