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Does anyone know the name of them? This is my first time to see it
This component is a Diode, specifically the part number 1N4148 or 1N914 (they are equivalent).
You can see its specifications on datasheets bellow:
https://www.vishay.com/docs/81857/1n4148.pdf
https://www.diodes.com/assets/Datasheets/ds12019.pdf