這簡單的，網上很多介紹。磨工是關鍵，手工要磨成這個圓度不容易。你先試試手？

來源: 味苦於 2017-09-17 18:24:36 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.