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SBGrad: Foxtrot class torpedo tube
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SBGrad: Surgical exam room on a submarine
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SBGrad: Pressure hatch
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SBGrad: Soviet ship's annunciator
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SBGrad: Escape trunk hatch
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SBGrad: Foxtrot aft torpedo room
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SBGrad: Foxtrot class sail
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SBGrad: Pier side view of B-39
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SBGrad: Project 641 submarine
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SBGrad: B-39 Soviet Foxtrot class submarine
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SBGrad: USS Dolphin AGSS-555