| 摘要 |
The pearl (1) has an external surface (3), and a through opening (2) allowing a passage of a bond e.g. nylon yarn. The opening includes two ends (20, 21) opened on the external surface of the pearl. A magnetized part (4) is placed close to one of the ends of the opening. A hollow tube (6) allows the passage of the bond, and is placed inside the opening. One of ends of the tube is provided with the magnetized part and forms a magnetic north pole, and the other end of the tube forms a magnetic south pole. |
