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Drill for drilling through sandwich-structure workpieces is in form of stepped drilling tool with smaller-diameter preliminary drilling sector
Drill for drilling through sandwich-structure workpieces is in form of stepped drilling tool with smaller-diameter preliminary drilling sector
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机译:用于钻削夹层结构工件的钻头为阶梯钻具,具有较小直径的初步钻削区
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摘要
The drill is in the corm of a stepped drilling tool, with a preliminary drilling sector (VA) of smaller diameter and a fine finishing sector (FA), in which the web left between the main grooves is divided by at least one more groove into a preliminary web and at least one subsequent web with finishing cutter and grinder.
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