| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve efficiency of user's work and allow for compact storage of a plurality of covers. <P>SOLUTION: Four covers 81 and connections 82 integrally turn around a part where a protrusion 85 is engaged with a first link aperture 87 and a second link aperture 88 as a center when user moves a handle 86a and a handle 86d nearer and farther, so that the gap between the adjacent covers 81 is disappeared. <P>COPYRIGHT: (C)2010,JPO&INPIT |
