Other big mining companies helped with advice and equipment.
另一家大型的矿业公司协助提供建议和设备。
Principal business: building materials, chemicals, mining equipment, steel, coal, cement, and other serial products.
主要经营：建材，化工，矿用设备，钢材，煤炭，水泥等系列产品。
Principal business: building materials, chemicals, mining equipment, steel, coal, cement, and other serial products.
主要经营：建材，化工，矿用设备，钢材，煤炭，水泥等系列产品。
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