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The packing gland for the conventional high-pressure grouting is modified to be adaptable to the low-pressure curtain grouting;by which the application area of the grouting method is enlarged along with improved grouting quality and shortened construction period.

通过对常规孔口封闭灌浆法的孔口封闭器进行改造,使孔口封闭灌浆法也适应于低压帷幕灌浆工程,从而扩大了其适用范围,提高了工程质量,缩短了工程工期。

Comparison between amplatzer septal occluder and surgical closure of secundum atrial septal defect;

目的　对继发孔房间隔缺损 (ASDⅡ )的Amplatzer间隔封闭器 (ASO)介入和外科治疗的疗效和安全性进行比较研究。