TECHNICAL STUDY OF DEEPER MINING FROM LARGE DEEP HOLLOW OPENCAST WORKING TRANSFER TO UNDERGROUND MINING
英
美
- 大型深凹露天转井下深部开采技术研究
- 今日热词
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- 深远海浮式风电平台 - deep-sea floating wind power platform
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- 京雄高速公路 - Beijing-Xiongan expressway
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- 农业及相关产业增加值 - the added value of agriculture and related industries
