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Drill bit with flat face - has projecting groups of synthetic diamonds sepd. by drainage zones
Drill bit with flat face - has projecting groups of synthetic diamonds sepd. by drainage zones
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机译:平面钻头-带有突出的合成钻石sepd组。按排水区
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摘要
The performance of a drill bit (1) is improved by dividing the cutting elements (8) into small groups, each fixed to separate islets (4) distributed over the entire surface of the tool. In this type of tool, each rinsing orifice is advantageously equipped with an injection nozzle (7). IMAGE
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