vase-shaped相关论文
以在建樟树市赣江二桥工程为工程背景,采用大型有限元计算软件ANSYS建立主塔及其承台三维有限元实体模型,对主塔横梁预应力、下塔......
Vase-shaped microfossils(VSMs) described herein mainly occur as isolated individuals in thin bedded siltstone and silty ......