15w定焦激光如何定焦？
15w定焦激光器焦距不可调，固定焦距约 2CM,请务必使用附送的定焦柱，
每次雕刻前确保被雕物体上表面距离激光头（定焦柱）距离正好是铝柱高度
每次雕刻前确保被雕物体上表面距离激光头（定焦柱）距离正好是铝柱高度
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