Employment of Du Ruiguan, 1936–: 陝西涇惠渠管理局 (技士)
Occupation
: id 50706
Organisation
陝西涇惠渠管理局
Original occupation text
技士
Range - Start date
1936
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Du, Ruiguan 杜瑞琯 (1908–)
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Added
2021-04-10 13:47:55 (
local)
Updated
2023-02-20 10:45:22 (
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