However, in the late 1960s, petroleum began to replace coal as the predominant energy export in Japan, and in 1974 Mitsubishi closed its Hashima mine.
然而，随着20世纪60年代日本国内石油代替煤炭成为主要出口能源，三菱公司于1974年关闭了它在端岛的煤矿。
The system can be used for the domain of forestry, petroleum, mine, geology and so on, especially fit for the west-north remote regions.
该系统可应用于林业、石油、矿山、地质等领域，尤其适合于西北边远地区。
Fit for forging and processing for industry of auto, train, watercraft, aviation, mine machinery, petroleum machinery and hardware, necessary high precision forging equipment.
广泛用于汽车火车船舶航空矿山机械石油机械五金工具等行业零件的锻造加工，是现代锻造生产者不可缺少的高精度锻造设备。
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