Aboard the orbital stations, "Salyut-7" and "Mir", investigations on the peculiarities of moisture transfer in capillary-porous bodies (CPB; that is, soil substitutes) in microgravity were conducted by the authors with a specially designed device and an original method. Water distribution in CPB-perlite (fractions 1.5... 2.5 mm) was studied, and theoretical dependances for linear capillary impregnation of CPB were determined.
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