Large mining equipment cannot be operated on narrow benches.
大型采矿设备不能在窄台阶上操作。
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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