| 摘要 |
<p>The present invention relates to an iron string and a method for manufacturing the same. Tip parts, arranged on both ends of the iron string, are melted and shrunken by heat. Therefore, the iron string is tightly bound and thus is not easily separated or loosened even after repeated use in many times. Therefore, the iron string can be semi-permanently and repeatedly used. Moreover, diameters of the tips parts are smaller and harder than a diameter of a middle part of the iron string. Therefore, the iron string can be easily inserted in and pulled out of a punched hole of a document with a small diameter.</p> |
