screw thread core pulling
screw thread core pulling
螺纹抽芯
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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The specialty of the design is the flexible core-pulling structure that solved the difficult problem of unloading the screw thread and moulding the through hole at the same place.
其特别之处在于采用灵活的抽芯机构解决了在同一位置脱螺纹和成型碰穿孔的复杂问题。
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