| 摘要 |
The casing (10) has multiple passage holes suitable for the introduction of screws, where each passage hole (12) includes a protective polymer element (11) intended to protect the casing from direct contact between the interior (13) of the passage hole and the respective screw. The protective polymer element is in the form of a sleeve introduced into the passage hole. A flange forming a shoulder is provided at one of ends of the protective polymer element, where the polymer element is made from one of polyimide resin, polyetherimide resin, and reinforced glass polyetherimide resin. |
