CAOFEIDIAN - DECEMBER 1: The crank balanced beam pumping unit and all kinds of valve in the JiDong oilfield, on December 1, 2013, caofeidian, hebei province, China. Stock Photographsby zhangyuangeng5/150
Reinforcement metal framework for concrete pouring. Ready for filling up with concrete Pictureby bubutu1/6
CAOFEIDIAN - DECEMBER 1: The crank balanced beam pumping unit under the curtain of night in the JiDong oilfield, on December 1, 2013, caofeidian, hebei province, China. Stock Imageby zhangyuangeng1/21
CAOFEIDIAN - DECEMBER 1: The crank balanced beam pumping unit under the curtain of night in the JiDong oilfield, on December 1, 2013, caofeidian, hebei province, China. Pictureby zhangyuangeng2/19
CAOFEIDIAN - DECEMBER 1: The crank balanced beam pumping unit under the curtain of night in the JiDong oilfield, on December 1, 2013, caofeidian, hebei province, China. Stock Photoby zhangyuangeng1/15
CAOFEIDIAN - DECEMBER 1: The crank balanced beam pumping unit under the curtain of night in the JiDong oilfield, on December 1, 2013, caofeidian, hebei province, China. Stock Photoby zhangyuangeng1/65
Detail of mechanical joint at crane's arm. Concrete transport over pipeline with pump Pictureby roman0230/2