Workers work nervously on the production line of new building materials calcium silicate board, North China

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

Keywords: automation, board, building, calcium, china, economy, effects, equipment, indoor, industry, installation, line, machinery, materials, mechanization, modern, north, production, silicate, special, type, work, worker