mehaaniline sõelumisseade, milles puistematerjalide fraktsioonimine klassifitseerimine (fraktsioonimine) toimub vibratsiooni toimel (vt sõel)
a mechanical device in which a stack of sieves, arranged in progressively reducing mesh or opening sizes, is shaken vigrously so that size fractions of a sample may be collected for analysis or use (see: sieve)
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