Ishlab chiqilgan ponksiyon igna qismlari - orqa miya ignasi

The inner needle can be pushed and pulled freely when inserted into the outer cylinder needle. The needle tips of the two needles have the same single-edged acute angle. At a certain distance from the tip of the needle of the outer cylinder, concave processing or triangular pyramid-shaped pit processing that can produce ultrasonic reflection is carried out.

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