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Different types of gun automatic mechanism reflect different design idea and style.
不同型号的火炮自动机体现不同的设计思想。
youdao
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The automatic mechanism is the key and difficult point of gun development.
自动机是火炮研制的关键和难点之一。
youdao
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The automatic mechanism is the key and difficult point of gun development.
自动机是火炮研制的关键和难点之一。
youdao