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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.《声临其境第2季》是由湖南卫视播出的原创声音魅力竞演秀，由王凯担任主持人，张国立、张铁林、王刚担任点评嘉宾。节目以台词和配音为切入点，每期邀请四组台词功底深厚或是声音动听的演员同台竞声，通过台词功底、配音实力和互动搭档的比拼，不见其人，只闻其声，纯声较量。节目每期设置“经典之声”、“魔力之声”和“声音大秀”三个环节，竞演嘉宾呈现的配音片段包括近年热播的仙侠奇幻剧、经典好莱坞商业片，动画片乃至人气网络游戏。NBC宣布提前续订《芝加哥警署》第四季。使得徐彤以为，越王尹旭也忌惮徐家的实力，内忧外患，不敢轻举妄动。此乃陛下旨意，我等为臣子者只能遵旨行事。我还是认为该杀，此人桀骜不驯，绝非真降。The Chinese character "China" inscribed on the stone is the only word that a Kirgiz grandmother living on the border of southern Xinjiang can write in her life.