Design Letter of Patent (the Condenser Head Of Super Conductive Tube Wu Keming)

Design Letter of Patent (Condenser End Sleeve Of Super Conductive Tube Wu Keming)

Design Letter of Patent (Condenser End Sleeve Of Heat Pipe Wu Keming)

Design Letter of Patent (Bracket Dai Xiaolin)

Design Letter of Patent ( wind-heat all-weather solar energy collector Yu Kun Bei)