FIELD: cleaning water from mechanical impurities in pipe lines. SUBSTANCE: straining element fitted in high-pressure pipe line is made in form of grate assembled from strips of similar thickness fastened together with over-lapping ends forming slotted holes; length and width of strips are so selected that frequency of natural oscillations of strips exceeds maximum exciting frequency of oscillations of water flow in pipe line. EFFECT: enhanced efficiency. 5 cl, 2 dwg
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