The article deals with the effects of urea and controlled release nitrogen fertilizer (CRNF) on dynamics of pH, electron......

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......

Prolonged immersion in floodwater is one of the main causes of embankment failure or dam breaks, although failure mechan......