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                             Pyongyang, Three Revolution Exhibition: channelling machine. 
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                             Pyongyang, Three Revolution Exhibition: front loader. 
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                             Pyongyang, Three Revolution Exhibition: drill rigs. 
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                             State Refinery Pyongyang: silver bar (front side), 20 gram, 999 fineness. 
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                                         State Refinery Pyongyang: silver bar (rear side), 20 gram, 999 fineness. 
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                             Sedimentary mordenite from an undisclosed North Korean locality. 
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