Year of Publishing
The drilling method developed by the Escuela Móvil de Agua y Saneamiento (Mobile School for Water and Sanitation) in Bolivia is a hybrid between washboring, percussion and rotary drilling. It permits to drill through all kinds of loose soils, as ell as consolidated materials and light rock. It will not, however, penetrate hard original rock or boulders (e.g. ancient river beds underground)
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CLOESEN, P. (2007) EMAS Drilling. , unpublished
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