... crude bar bolts, through bolts shear connection, the entire tower from the angle iron, steel plate and bolts to connect the ... Jiaozhou City, Qingdao, Shandong Province, and has branches in Beijing, Inner Mongolia, Chongqing and Xinjiang. Our production base takes up an area ... Keeps Promise' by the Industrial and Commercial Bureau of Qingdao from 2001 to 2009 in succession. Project view Power line tower ...