目前,采矿工业对各方面的费用支出都在进行最充分的推敲,特别是涉及到百万美元的投资。用两台或更多台较小型的索斗铲的投资比用一台大型索斗铲的要少。这不仅节省了设备的购置费用,而且经营中继续受益。采矿以往的趋势是向设备大型化发展,一些采矿公司通常试图用一台索斗铲能处理 Currently, the mining industry is making the most thorough scrutiny of all aspects of its expenses, especially as it involves millions of dollars of investment. Investing with two or more smaller draglines is less expensive than with a large dragline. This not only saves the purchase cost of the equipment, but also continues to benefit from the operation. Past trends in mining have been towards large-scale equipment, with some mining companies often trying to handle with a dragline