於海

Multi-angle conversion type obliquely climbing window-cleaning machine

李鹏, 吴安, 董威, 2011 .

Traveling device of oblique-climbing window cleaner

李鹏, 张华, 吴安, 2011 .

Telescopic arm self-balancing window-cleaning machine

李鹏, 吴安, 董威, 2011 .