應該丟進去微型傳感器，小如米粒，掌握洞裏人員流動情況。選擇性堵洞。

來源: 太宇於 2023-10-25 08:20:38 [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.