FIELD: forestry industry. SUBSTANCE: device includes base mounted on transportation facility, loading hopper, receiving hopper and flat sieves secured to lower portion of loading hopper by means of rods. Receiving hopper is provided with vertical slots on inner surfaces and bearing struts which have slots where springs are located. Loading hopper is secured to spring of bearing struts by means of sliders; it is mounted for motion over vertical slots of receiving hopper. EFFECT: enhanced efficiency of screening. 3 cl, 6 dwg
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