| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a ground agitation device capable of sufficiently preventing uneven agitation in a radial direction. <P>SOLUTION: A ground agitation device 1 includes a rotation shaft 10 rotating around the shaft center, a lower agitating blade 21 extending outwards from the rotation shaft 10, and an upper agitating blade 25 extending outwards from the rotation shaft 10 above the lower agitating blade 21, in which the lower agitating blade 21 bends in one of rotation directions and the upper agitating blade 25 bends in the other of rotation directions. <P>COPYRIGHT: (C)2013,JPO&INPIT |
