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平硐开拓
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平硐开拓
Encyclopedia
工学
矿床地下开拓方法
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adit development
平硐开拓
采用平硐作为矿石运出,人员、材料和设备出入的主要通道的开拓方法。
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Philippine Daily Inquirer
Philippine drama
Philippine Educational Theater Association
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Philippine Islands
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Philippine People's Anti-Japanese Army
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