A type of medium caliber guns apply gun short-recoil automatic mechanism cycle regularity, and use advanced technique to achieve high fire cycle, high accuracy and light weight.
某中口径舰炮采用炮身短后坐式自动机循环规律，运用先进的技术手段，实现了高射速、高精度和轻型化。
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In this paper, the formulae of hydraulic resistance for this naval gun's recoil mechanism is derived so that necessary technique can be provided for the reverse design to this naval gun.