sun daguang 中文意思是什麼
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Sun daguang, former minister of national geological ministry, issued an order of commendation to siwu for its significant contribution in geological exploration
為表彰第四物探大隊在地質找礦工作中做出的重大貢獻,原國家地質部部長孫大光簽發嘉獎令。
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