| 摘要 |
<p>The tube unit (1) has two spaced-apart slider tubes with a wheel receiving space formed between the tubes. A connector bracket (6) connects the two slider tubes above the wheel receiving space. The connector bracket has a hollow connector main portion (8) that extends from one slider tube to another slider tube. The bracket has an open basic profile and a reinforcing device which closes the opening of the basic profile.</p> |
