The optimization design mainly consists of two contents: adjustment of the mining boundary of open pit and optimization of production scale.

优化设计主要包括两方面的内容：露天开采境界的调整和生产规模的优化。

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Active lime pit is advanced in structure as it adopts reliable both-ends combined type scale sealing, making the air leakage factor below 10%.

活性石灰窑结构先进，采用可靠的回转窑两端组合式鳞片密封，使漏风系数小于10%；

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The quality of the haulage road in a large-scale open pit directly affects the operating costs and haulage efficiency of the trucks.

大型露天矿运输道路质量的好坏直接关系到矿用汽车运行成本和运输效率。

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De Beers is active in every category of industrial diamond mining: open-pit, underground, large-scale alluvial, coastal and deep sea.

FORBES: Anglo American Receives Final Regulatory Approval for De Beers Acquisition

Connected to the hotel by a newly built bridge and VIP lounge in between, the full-scale tent staged a few big performers, such as Pit Bull and Stevie Wonder.

FORBES: Bud Light Gives You Four Ways To Create A Powerful Brand