| 摘要 |
<p>The profile is designed in the form of a polygon with rounded corners and straight side surfaces, where the polygon is in the form of a quadrate. Control of functional elements takes place by rotational movement of a control rod (2) and a longitudinal axis of the control rod and by transmission of the rotational movement and rotational force to the functional elements. Curves of the rounded corners are formed as sections of a circle. A center point of the circle is similar to a center point of the quadrate. The profile is manufactured from metallic material by an extrusion or rolling process.</p> |
