Traditional Culture Encyclopedia - Traditional stories - Is the drill bit used to drill holes in Jin Gangzuan in ancient China a diamond?
Is the drill bit used to drill holes in Jin Gangzuan in ancient China a diamond?
According to the Ming Dynasty Heavenly Creations, ancient people used a machine called "wooden stool" to punch holes. Like the previous sewing machine, the head is not a diamond, but an iron needle-like and thin cylindrical object, commonly known as "needle weight"
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