1977-1982 Technician and Assistant Engineer of Ventilation District of Jinhuagong Mine of Datong Mining bureau.
1977- 1982大同矿务局晋华宫矿通风区技术员、助理工程师DatongMining bureau。
1977-1982 Technician and Assistant Engineer of Ventilation District of Jinhuagong Mine of Datong Mining bureau.
1977- 1982大同矿务局晋华宫矿通风区技术员、助理工程师DatongMining bureau。
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