aTransmission steel tower bar between the force is to be transfered by nodes, the nodes determine the form and structure optimization affects the overall mechanical properties of steel tower 传输钢塔酒吧在力量之间将被结转移,结确定形式,并且结构优化影响钢塔整体机械性能[translate] ...
5640982Tank cleaning system using collapsible robotic tank entry vehicle1997-06-24Landry et al.134/167R 5617604Pivoted roller cutter pipe cleaning tool1997-04-08Erich Foreign References: GB2253814A1992-09-23 Primary Examiner: HECKERT, JASON MARK ...