| 摘要 |
<p>The rail has legs (S1,S2) extending from a base (B) at a distance (A) to form a C-shaped cross-sectional profile. A discrete thickening portion (V) is provided in the leg (S1), so that distance between the legs is reduced. The thickening portion inner side is secured at the leg. The thickening portion is in the form of narrow parallelepiped. An independent claim is included for solar heat collector.</p> |
