| 摘要 |
<p>The device has five female cubic modules with rounded edges having one, two, three or four-sided recess (1), where each module is provided with a groove (2), and having a depth and a width wider than the groove so as to mechanically hold a cylindrical male part (3). Two male parallelepiped modules include a projection with a tongue, where the projection has a length and a width wider than the tongue for assembly of the projection into the recess of the retaining module for maintaining the cylindrical male part.</p> |
