| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a sieve greatly increased in working efficiency of the sieve. <P>SOLUTION: Holes in at least one of a file of holes and a line of holes are arranged on a nonlinear line. Thus, even when a particle flows on a space part between the holes and passes by the hole, it drops into another hole projecting on an extension of this space part and passes through the hole, a classifying speed is increased to increase the working efficiency of the sieve. <P>COPYRIGHT: (C)2013,JPO&INPIT |
