Employment of Cao Chen,–: North Shanxi Mining Affairs Bureau 山西大同晉北礦務局 (實習)

 Occupation: id 53187
Organisation
North Shanxi Mining Affairs Bureau 山西大同晉北礦務局 (晉北礦務局)
Original occupation text
實習
 
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Cao, Chen 曹諶 (1910–)
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