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How to make a pin of injection? What is the trade secret?

Those are so slim... How could those to make a hole in it?

2 Answers

Relevance
  • 1 decade ago
    Favorite Answer

    These are extruded (actually, pull-truded)

    Its cheaper to buy them from someone then to make them, because to make them, you would have to make a gazillion of them to pay for the machine and the tool.

  • Dr Dee
    Lv 7
    1 decade ago

    industrial machinery

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