33
/
AIzaSyAYiBZKx7MnpbEhh9jyipgxe19OcubqV5w
August 1, 2025
9407653
899870
1
Public Timelines
Public TimelinesFAQ
Public TimelinesFAQ
For educational institutions For teachers For students Cabinet
For educational institutions For teachers For students Open cabinet
Create
Create a timeline
Public timelines
Library
FAQ

jan 4, 200 BC - 前2世纪,刘安(前179-122)著淮南子,记载用冰作透镜,用反射镜作潜望镜

Description:

地点：
人物：
意义：
补充：

Added to timeline:

Ht

Bylee66
29 Mar 2024
0
0
139

Date:

jan 4, 200 BC
Now
~ 2226 years ago
About & FeedbackTermsPrivacyLibraryFAQ
Support 24/7  
CabinetGet premium
Donate
The service accepts bank transfer (ACH, Wire) or cards (Visa, MasterCard, etc). Processed by Stripe.
Secured with SSL