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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.郑氏及时制止他，道：你别乱教他。Http://www.jiemian.com/article/1948579.html2.5 Supplier Participation7. MDT meetings can give patients the opportunity to be included in high-quality clinical trials;Top　　1941年，太平洋战争爆发前夕，国际反法西斯同盟特使秘密访华，召集国共双方地下情报组织代表，召开秘密会议，商讨双方在敌占区对日情报的工作配合。汪伪特务机关大肆布置抓捕行动，不料却意外扑空。与此同时，汪伪破获一军统情报站，通过对交通员的严刑逼供，得知密