做天文望远镜由于室外，所以要先退火然后研磨。

来源: chufang 于 2024-05-12 09:25:51 [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.