... 科夫环 Kopfring 可变后座 variable recoil 可变时间引信 variable time fuse ...
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variable recoil control rod 节制杆
variable recoil mechanism 变后座装置
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A theorem on kinetic energy for variable mass-point and formula of work of recoil internal forces are given and the reason of soft-rope query is discussed.
给出变质量质点的动能定理和一对反推内力作功的表达式,并由此给出软绳问题的正确解释。
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