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该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生......
Carbon sequestration in the total and light fraction soil organic matter along a chronosequence in g
本文通过对荣华二采区10...
Carbon sequestration in the total and light fraction soil organic matter along a chronosequence in g
Horqin Sandy Land is a fragile,seriously desertified region located in Inner Mongolia of China.Overgrazing is one of the......
In the Ethiopian highlands,communal grazing lands are one of the major land uses,and are source of livelihood for the ru......
Two species of Ephedra: E. trifurca and E. torreyana inhabit shrub and grassland habitats in the northern Chihuahuan Des......
