[Silver angle ruler]
The silver angle ruler was 33.5 cm long and 3.9 cm wide in the Kangxi period of the Qing Dynasty
![图片[1]-Silver square-China Archive](https://chinaarchive.net/Qing dynasty/Clockwork instrument/23755[1024].jpg)
![图片[2]-Silver square-China Archive](https://chinaarchive.net/Qing dynasty/Clockwork instrument/23754[1024].jpg "银质康熙角尺")
银质康熙角尺
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![[Qing Dynasty] British female painter—Elizabeth Keith, using woodblock prints to record China from the late Qing Dynasty to the early Republic of China—1915-China Archive](https://chinaarchive.net/wp-content/uploads/2022/11/image-191x300.png)
