A temporary plugging agent comprising graded granules of salt that form a physical or hydraulicbarrier.
包含形成物理屏障或水力屏障的分级盐粒的暂堵剂。
2
The Rapidly Emplaced Hydraulic Arch Barrier, made of the same material as the other two devices, can be put in place around a plugged breach to keep it sealed and dry once the plug has been removed.