搜索 - 科创

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.再用一个开孔器，直径和刚才的铁管外径一致13.在还未加工的收敛段一侧扩孔，到接近扩张段与喷喉相接的位置（留一点，不要到头）14.把铁管放进去15.用一点环氧树脂把他粘住（如果流动性太强也许可以用别的方法

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