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KNSh 41-25.7BSr MX Core Drill Bit for 41mm Diameter Boreholes
Manufacturer:
Machine-Building Holding OJSC
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Description
The drilling perforator crown KNSH 41-25.7BSr (hereinafter, the crown) is designed for drilling of boreholes with diameter of 41 mm in rocks and ores with coefficient of strength =6.....20 according to Protodyakonov (GOST 21153.1-75) by pneumatic perforators
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