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The famous lever squat belt. It is characterized by convenient wearing, but still belongs to single row type. In terms of strength and stability, it is not better than double rows of the same specification.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.　　Tom的家庭也有了变化，父亲Steven被派往上海公干，母亲秀梅辞去了杂志编辑的工作，当特约记者，以方便自己在家照顾两个孩子和家婆，母兼父职的她面对教育孩子的问题，婆媳相处上，时而遇到问题颇为难。该剧讲述了从灵光嫁到高昌后，30年来独自养育子女的农产品批发商灵光宅(高斗心饰)在美国接受医疗服务的儿子成柱(赵东赫饰)带着陌生的异国人秀智(姜恩珍饰)突然回国后发生的故事。他们一行共四人，进来后略一打量帐内，目光在自己和胡钧汪魁的身上扫过，略有些愣神。【创作背景】