中文字幕久精品视频在线观看

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      煤礦用全斷面掘進機

      煤礦用全斷面掘進機是特為煤礦巖巷工程設計的巷道開挖設備。為在煤巷中安全掘進,整機有煤安證書。在較完整、有一定自穩性的圍巖中,特別是在巖石堅固性系數大于f7的巖層中,相比懸臂式掘進機和鉆爆法,施工效率能夠提升4-6倍。在煤礦巷道施工領域開創了全機械化開挖方式,將引領煤礦巷道施工的技術變革。

      中文字幕久精品视频在线观看
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