| 摘要 |
The case closure is a semi-circular disc-shaped cover (1). The disc receiving part is a pocket-shaped cover (2) whose space (6) has a plate spring (20). The closing cover (1) has an internal contour of greater radius and thickness than the item inserted and an external contour of lesser radius and thickness than the height of the internal contour of the pocket-shaped inserting cover. Both covers have a cylinder-shaped recess (5) at their hinge pin (18), fitted with a conical peg (27).
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