| 摘要 |
<p>The post has a U-shaped cross section (20) contained in spaces defined by a part of half spaces that is delimited by a transverse wall (13), which is located between portions (31, 32) of side wings (11, 12) located in half space. The portions of the side wings are not in contact with two side branches (23, 26) of the U-shaped cross section. A base (27) is closer to the transverse wall of H-shaped cross section. Another base (28) is closer to one of the side wings and farther than other side wing.</p> |
