7609| 16
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薄板打螺紋孔,該如何保證質量 |
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點評
正是因為薄所以才對鉆頭絲錐要求高,稍微鈍一點就不好用了,薄板人工鉆孔很容易出現用力過大導致鉆頭刃口溫度過高而磨損,鋁屑太薄不能吸納多少熱量所以溫度會很高,
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