mine workings

短语词组

短語

• Mine workings firmness 井巷穩固性
• detail survey for mine workings 鑛井工程碎部測量
• ground plan of mine workings 鑛山巷道底麪圖
• water burst in mine workings 鑛井突水
• three -dimension mine workings 三維井巷
• Three -dimension underground mine workings 三維井巷
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