Beam pumping unit
Contributor: zhengzaishanchu
ID : 99034009
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Keywords
sunset, sky, energy, equipment, machine, oil, industry, silhouette, rig, drilling, unit, pump, fuel, technology, economic, work, gas, process, orange, diesel, wealth, money, pipe, background, beautiful, construction, china, homework, blue, labor, strength, heavy, horsehead, industrial, crude oil, rod, field, digging, mechanical, derrick, crude, sun, engineering, steel, natural, exploration, sunrise, rockingRelated items
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