FIELD: analysis of materials. SUBSTANCE: process is realized by means of two surfaces. In center of one of them there is made hollow. Process includes multiply repeated operations consisting in feeding of powdery substance into hollow to form heap, its compression with approach of two surfaces to obtain preset clearance between them, return of compressing surfaces to initial positions. This sequence of operations is repeated many times till substance on edges of surfaces is driven from clearance. Versions of process involves different types of compressing surfaces and character of of their movement in process of compression of substance. EFFECT: enhanced efficiency of analysis. 8 cl, 9 dwg
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