长江堤防隐蔽工程建设中，采用新技术、新工艺、新材料和新设备建造了大量的垂直薄防渗墙。

In the process of concealed works construction of the Yangtze levee, a large amount of vertical thin seepage prevention walls were constructed by new technology, new material and new equipment.

youdao

长江堤防隐蔽工程建设中，采用新技术、新工艺、新材料和新设备建造了大量的垂直薄防渗墙。

In the process of concealed works construction of the Yangtze levee, a large amount of vertical thin seepage prevention walls were constructed by new technology, new material and new equipment.

youdao