extraction of raw material 原料提取 ; 原料萃取
There are four key industrial economic sectors: the primary sector, largely raw material extraction industries such as mining and farming;
有四个主要工业经济部门：初级部门，主要原材料的开采，如采矿业和农业；第二产业，涉及炼油，建筑，制造；
The value of the raw material for extraction can be lost after six to twelve months’ storage.
在储藏6至12个月之后，可能失去原材料提取的价值。
The above study has essentially determined the extraction process of lycopene from tomato skin, test method of lycopene content as well as storage method of raw material.
通过以上的研究，基本确定了番茄红素含量的检测方法、番茄皮中番茄红素的提取工艺以及原料的储存方法。
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