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Conveyor belt with coal shooting in slow motion. Close-up there is coal on belt conveyor. Conveyor belt coal. Machine for loading mining in coal obage factory

视  频 ID：  1044082825
版      权：  Timofeev Sergey
视频长度：  0:13
横纵比率：  1.90:1
所属分类：  工业 
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