| 摘要 |
<p>A movable mineral material processing device comprising a feed hopper, whose walls (21, 22, 23) are arranged to be turned upward to a working position, and which are locked into said working position. To lock the walls (21, 22, 23), there is at least one locking means (L) in connection with them, said locking means containing at least a locking member (31) and transfer means (32). According to the method the locking member (31) is transferred to the locking position with the transfer means (32).</p> |
