Create account

From Chronopedia
It is recommended to use a unique password that you are not using on any other website.
Real name is optional. If provided, it may be used to give you attribution for your work.
What is the common name for sapphires or rubies (usually synthetic) that are shaped into gear bearings to reduce friction and increase the life of the movement between servicing?

Chronopedia is made by people like you.

7,795

edits

859

pages

0

recent contributors