高清一级淫片a级中文字幕,亚洲无码免费在线小视频,精品国产群3p交换,国产初次视频观看

A worker maintains generation equipment in the demonstration base of solar thermal power generation in Xuanhua county, north China's Hebei province on Aug. 23. (People's Daily/Shi Zhiqiang)

Compared with the photovoltaic, alternating current can be directly generated by solar thermal power without conversion, which better matches with the existing power grid. It can be directly transmitted through the grid.