Fig. 13
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Principe de mesure à l’aide de la sonde hydraulique triple. 1 : Sonde hydraulique triple ; 2 : obturateurs ; 3 : chambre de mesure centrale ; 4 : piézomètres latéraux (Doc. Louis, 1974).
Testing principles using the triple hydraulic device. 1: Triple hydraulic device; 2: packers; 3: central measurement chamber; 4: lateral piezometers (Doc. Louis, 1974).
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