| 31. | The North Sea Mine Barrage saw the laying of over 70, 000 mines during the summer of 1918.
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| 32. | The gunboats were destroyed with surface-to-surface missiles, sea mines, or rocket-propelled grenades.
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| 33. | Because deep sea mining is a relatively new field, the complete consequences of full scale mining operations are unknown.
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| 34. | In that reconstruction she obtained modern anti-aircraft armament and the equipment to carry and lay 100 sea mines.
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| 35. | It was uncertain if the guerrillas used surface-to-surface missiles, rocket-propelled grenades or sea mines.
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| 36. | Forced to work as a slave on a deep sea mining facility, Obi-Wan meets a Phindian named Guerra.
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| 37. | Drifting sea mines proved to be a considerable problem and resulted in the loss of numerous fishing boats and their crews.
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| 38. | Realising that the factory pollution is the source of the problems, Octo procures some old sea mines from a submarine.
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| 39. | Originally the tube is from Imperial Russia�s torpedo boat Bditelnyi, which sank after hitting a sea mine in November 1917.
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| 40. | In an attempt to seal up the northern exits of the North Sea, the Allies developed the North Sea Mine Barrage.
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