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Bearing assembling. Industrial and machinery concept. Moving small metal balls on conveyor. Technological part of bearing production. Conveyor in bearing factory. Grinding balls. 4 k video

视  频 ID：  1089820945
版      权：  Filatov Alexander
视频长度：  0:15
横纵比率：  16:9
所属分类：  科技 工业 
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