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how to distinguish original carbide PCB drill bits and the refurbishing ones? [Deleted]

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Yu Xiang

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Yu Xiang submitted a new article:

how to distinguish original carbide PCB drill bits and the refurbishing ones? - pcb drill bits

Hi, Friends, Have a nice day!
Excuse me!
how to distinguish original carbide PCB drill bits and the refurbishing ones?
Not by the CNC machine, but our eyes.
Thank you!

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