статья  Some features of using a spiral drill with a stepped blade for processing holes in elastic-viscous materials

The main advantages and disadvantages of well-known spiral drills with a multi-stage blade. It is described that the bridge, together with the steps adjacent to the grooves, is a small centering drill, performs centering and drilling during the process.

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Рубрика Производство и технологии
Вид статья
Язык английский
Дата добавления 10.02.2021
Размер файла 223,9 K

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