Background: In the German Democratic Republic(GDR), resin tapping in Scots pine(Pinus sylvestris L.) forests was a major......

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......

The radial growth of trees in mountainous areas is subject to environmental conditions associated with changes in elevat......