| 摘要 |
<p>The tube (1) has an open tube equipped on longitudinal edges of a mutual attaching unit, where the attaching unit is constituted of clipping teeth (20, 30) and disposed on entire length of the tube. The longitudinal edges are constituted of embedding tongues having thickness equal to half of the total thickness of the tube, and the clipping teeth are disposed on faces in contact with the tongues.</p> |
