annual mine output 中文意思是什麼
annual mine output
解釋
礦山年產量-
At present, annual output is 4 million tons in whole china, 2. 2 million tons for export and 1. 8 million tons for domestic market. but it is still blank in magnesite refractory for northwest area ; therefore development of halehate magnesite mine is of great market prospect and economic benefit
目前,全國年產400萬噸,對外出口220萬噸,內銷180萬噸,而西北地區鎂質耐火材料尚屬空白,因此開發哈勒哈特菱鎂礦具有很好的市場前景和經濟效益。
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