The hinge has a central portion (50) with a convex outer surface, with the lid closed and as viewed in side elevation, that blends with a smooth curvature into outer surfaces of the lid and the base.
所述铰链具有中心部分（50），在盖闭合时并且从侧面正视图观 察时中心部分（50）具有凸的外表面，所述凸的外表面以平滑曲率融入所述盖和所述基体的外表面。
The hinge has a central portion (50) with a convex outer surface, with the lid closed and as viewed in side elevation, that blends with a smooth curvature into outer surfaces of the lid and the base.
所述铰链具有中心部分（50），在盖闭合时并且从侧面正视图观 察时中心部分（50）具有凸的外表面，所述凸的外表面以平滑曲率融入所述盖和所述基体的外表面。
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