Through modification of operating condition, there are three classes of pure auriferous pyrite liberated from the head of mill.

通过适当地调节各种选别方法的操作条件，物料分三个级别分离提纯含金黄铁矿纯矿物。

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Improving the motion stability of the main head of tube rolling mill has great influence on improving the rolling quality of the tube.

提高轧管机主机头运动稳定性对改善钢管的轧制质量有着较大的影响。

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It is necessary to hit accurately the head of the strip for applying absolute AGC in hot rolling mill, important means are to improve accuracy of set-up model and convergence of self-learning model.

带钢热连轧精轧机组穿带后的头部厚度精度- - -头部命中率将直接影响绝对AGC的工作，其重要手段是靠提高设定模型精度、模型自学习的收敛速度。

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Karen Mill, head of the Small Business Administration (SBA), said two of every three new jobs in this country are created by small businesses.

FORBES: Obama vs. Romney -- Which Presidential Candidate Favors Small Businesses?

As soon as you are properly hydrated and fortified at the mill, head west to the town of Essex where Connecticut River Expeditions runs a Fall Foliage Cruise aboard the RiverQuest.

BBC: A Fall foliage tour of New England