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最佳答案：The drilling heat comes from chip deformation and mechanical friction,comparing
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最佳答案：As static or friction,slight penetration can be generated possibly,which is caus
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最佳答案：Nailhead weakness and to deviation(drill a hole and electroplate behind)Manufact
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最佳答案：This procedure is to complete drilling, reaming lever, expanding 10H9 holes and
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最佳答案：“selfish " is not my original intention, it looks like the pledge which the tear
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最佳答案：I cherish the memories of my middle school, which are the happiest time in my li