How to distinguish the size of the needle of the high-precision dispensing machine

The size of the needle of the dispensing machine mainly defines the size of the inner diameter and outer diameter of the needle, and the size of the needle is identified by a combination of numbers and letters G. At the same time, in order to make it easier to distinguish the size of the needle, different types of needles are produced with different color bases. This is the national standard and has a unified specification. The needles of the same model also have different lengths, the conventional one is 1 inch, and some are extended.

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