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上尉
 
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最早见于NW,里面提到“A great disadvantage of this type of construction was that the gun could only be relined by completely boring out the inner A tube. This was so expensive a process that it was considered to be more practical to simply replace a worn out gun with a new one, although it does not appear that either battleship was ever regunned during the war. ”
接着又在轴心国和中立国的战列舰一书中说这炮和英国MkI 15L42类似,也和蝗国之前的14和16.1一脉相承,也就是说是个传统血统的英国丝紧工艺的主炮,寿命到了把最里面一层抽出来,换一层重新刻线的传统方法应该是行的通的
最近把老美的O-45N那个关于日本18寸炮塔的报告看了,发现里面更详细的说了与其再次刻线,不如造个新的,见报告16页(最近贴图老失败……),不过也没说为什么取出内管的行为特别贵的具体的原因,而这个方式是常规的英国火炮再利用方式
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