用稍硬的石头磨尖当钻头即可。为什么非要用金属？

来源: lzhdshd 于 2020-09-01 02:15:32 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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