蓟县早寒武—新元古不整合界面处风化壳碳酸盐碳,氧同位素组成特征

A new method of stereotaxic clipping of arterial and AV aneurysms has been developed. The surgical technique and the special clipping device are briefly described. Successful results have been obtained in 30 clipping operations performed on 27 patients with arterial or AV aneurysms at different loca... View More