Meanwhile the price of the iron ore the steelmakers import as their core ingredient rose by nearly 50% in the first half of the year, squeezing margins.
同时钢厂进口的铁矿石原材料的价格在上半年上涨了将近50%，进一步挤压利润空间。
The studied acid volcanic rocks make up the main core part of the Baiyinchang volcanic dome structure, and is the ore-bearing rocks of Kuroko Baiyinchang-style ore deposit as well.
酸性火山岩是构成白银厂火山穹隆的主体核心，也是黑矿型白银厂式矿床的容矿岩石。
ZJS series of core barrels are developed to cope with strongly altered gold ore and body which is hard, brittle, of alternate hardness and difficult to core.
针对某含金矿地层蚀变强烈，岩矿层硬、碎、软硬不均、取心困难的特点，研制了ZJS系列钻具。
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