30度角？ 0.8122 sine(alpha) = sine(24)

来源: 古道阳关于 2022-05-27 10:03:42 [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.

Change Ad Consent