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Drilling holes in various materials

Ticket 1. 1) Drilling. a necessary operation to obtain holes in various materials during their processing, the purpose of which is: 1) Drilling. a necessary operation to obtain holes in various materials during their processing, the purpose of which is: Making holes for tapping, countersinking, reaming or boring. Making holes (technological) for placing electrical cables, anchor bolts, fasteners, etc. Separation […]

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