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Home › Twist drill having at least two cutting inserts at the tip each with its own J-shaped chip guiding flute and a method for the production thereof

Twist drill having at least two cutting inserts at the tip each with its own J-shaped chip guiding flute and a method for the production thereof

US Patent 8317438 · Granted Nov 27, 2012

Estimated economic value: $5,769,000 ⓘ

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