財聯社6月13日電,國產大直徑煤礦巷道硬巖掘進機“東坪號”下線。“東坪號”開挖直徑達7.64米,整機長度約127米,總重約1000噸,由中鐵二十三局與鐵建重工聯合打造,將用于內蒙古鄂爾多斯市準格爾旗東坪煤礦項目建設。
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