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确定红孩儿没有危险，周青趁机问起修道上的一些事。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.211. X.X.8I have the confidence to mention divorce. It's a big deal to live alone.Action: Stupid Force谈到此事，众人都愤愤不平，一个个怒不可遏，几欲直接提剑上去砍人。In the above figure, using the-A option, It means "adding rules" in the corresponding chain, and-A means append, so-A INPUT means adding rules in the INPUT chain, while the-I option used in the previous example means "inserting rules" in the chain. As you must understand, their original intention is to add a rule, but-A means adding rules at the end of the chain, and-I means inserting rules at the beginning of the chain.