| 摘要 |
The present invention concerns a grinding apparatus ( 1 ) including a number of grinding units ( 3 ), a number of drive units ( 11 ) and a number of screen units ( 2 ), where a number of the grinding units ( 3 ) are enclosed by at least one of the screen units ( 2 ), and where at least one the screen units ( 2 ) is arranged with a pipe connection ( 4 ) adapted for connecting one or more suction units ( 21 ), where the screen unit ( 2 ) with the pipe connection ( 4 ) is designed along a lower edge ( 6 ) with a number of spacer members ( 7 ) that are arranged adjustable and replaceable, and a number of sealing members ( 8 ) that fit tightly to an underlying surface, that the spacer members ( 7 ) establish an adjustment of spacing of the grinding units ( 3 ) relatively to an underlying surface, and that the sealing members ( 8 ) interact with the suction units ( 21 ) for forming a vacuum that holds the grinding apparatus ( 1 ) against the said surface during operation.
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