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......

Monocultures of spring wheat (Triticum aestivum L.) were grown at overcrowded densities (10 000 and 3 000plants per m2) ......

杉木是我国南方重要的用材林造林树种,杉木人工林的持续经营是南方林区森林可持续发展的重要组成部分.而杉木人工林自然稀疏机制和......

Relationships between diameter at breast height(dbh)versus stand density,and tree height versus dbh(height curve)were ex......