Crank balanced beam pumping unit in the oil field
Contributor: zhang yongxin
ID : 247264544
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Keywords
machinery, equipment, facility, construction, crude oil, industrial, engineering, professional, technical, pressure, power, support, economic, trade, commerce, structure, framework, sky, closeup, processing, petrochemical, factory, natural gas, resource, energy, production, operation, safety, danger, colours, wild, light, night, evening, sunset, sun, silhouette, effect, flare, black, surface, waterRelated items
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