| 摘要 |
A sieve of screen contains longitudinal supports, in which by longitudinal sidewalls adjacent elastic cards are fixed, in surface of which the openings for screening are made, in this case the cross section of longitudinal supports and respectively overall section of two longitudinal sidewalls of adjacent elastic cards have a form, which is enlarged downward. In the cross section the longitudinal supports above and from their two sides are made with circular rounding, in the place of adjoining to which each corresponding longitudinal sidewall of adjacent elastic cards is made with appropriate circular rounding.
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