** Improvement & upgrade: [[Bi Type 40mm Twin Autocannon Mount]]
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** Improvement: , [[12.7cm Twin Gun Mount Model C Kai 3 H]]
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** Improvement & upgrade: [[Bi Type 40mm Twin Autocannon Mount]], [[61cm Quadruple (Oxygen) Torpedo Mount]], [[12.7cm Twin Gun Mount Model C Kai 2]], [[12.7cm Twin Gun Mount Model C Kai 3]]