datong district 中文意思是什麼
datong district
解釋
大同區-
Mining technology for thin coal seam in datong mining district and development direction
大同礦區薄煤層開采技術及發展方向 -
Inquiring into large cut - hrough survey in west district of datong no. 1 mine
打通一礦西區大型貫通測量探討 -
Prediction and prevention of water accumulation in goaf of datong mining district
大同礦區采空區積水的預測與防治
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