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在将战斗部装配到其推进系统(火箭发动机)之后,在发射和飞行期间,战斗部和推进系统必须始终保持锁紧状态。传统做法是,在战斗部和火箭发动机之间用粗牙螺纹拧紧,并用滚花表面协助锁紧。最近克莱斯勒-亨兹维利公司的电子分部为美国陆军军械研究和发展司令部研制出滚花表面的半自动光学检验系统
After the warhead is fitted to its propulsion system (rocket motor), the warhead and propulsion system must remain locked during launch and flight. Traditionally, coarse threads have been tightened between the warhead and the rocket engine and the knurled surfaces were used to assist in locking. The recent Chrysler-Hendrickville electronics division developed a semi-automatic optical inspection system for knurled surfaces for the US Army Ordnance Research and Development Command