短语词组短語magnetic blunt -tip needle 鈍尖磁針magnetic c blunt -tip needle 鈍尖磁針tip blunt 尖發生鈍化crack tip blunt 裂尖發生鈍化Tip Blunt Circle 先耑鈍圓crack tip to blunt 裂尖鈍化 返回 blunt tip