| 摘要 |
<p>The connection has interconnecting parts (31,32) connected with a bottom side of plank (11-13). The interconnecting part (31) found on the longitudinal side of the bottom side of the plank protrudes under the bottom side of the plank. Another interconnecting part found on other longitudinal side of the bottom side of the plank protrudes upto the bottom side of the adjacent plank.</p> |
