workers operate the distributor on the calcium silicate board production line, North China

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Size: 6720px × 4480px
Photo credit: © YongXin Zhang / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: advanced, board, building, calcium, china, close-, device, economy, equipment, factory, heavy, industry, iron, line, machinery, materials, mechanization, metal, plant, processing, production, silicate, steel, technology, workshop