mine workings
短語詞組
- Mine workings firmness 井巷穩(wěn)固性
- detail survey for mine workings 礦井工程碎部測量
- ground plan of mine workings 礦山巷道底面圖
- water burst in mine workings 礦井突水
- three -dimension mine workings 三維井巷
- Three -dimension underground mine workings 三維井巷 返回 mine workings