| 摘要 |
<p>The surface (1') of at least one side of the throttle cap, which can be the side facing the engine, is at least partly covered by a grid structure. The grid structure is a lattice screen made of parallel and right-angled positioned grooves, enclosing square-shaped projecting parts (4) which can have hollow spaces (4'). The lattice screen can consist of parallel and cross-wise projecting parts enlosing hollow spaces. The grid structure can be divided on at least one side by ridges (2).</p> |
