pubs.usgs.gov · PDF filestatic force which prevents the walls of the hole from collapsing. In...
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pubs.usgs.gov · PDF filestatic force which prevents the walls of the hole from collapsing. In ... When water-bearing material is ... the sediments and fill the bucket
![Dream is Collapsing From Inception[1]](https://img.pdfslide.net/doc/110x75/577ce4f91a28abf1038f87c9/dream-is-collapsing-from-inception1.jpg)
