Hoc ferrum diamantinum, quod materiās diamantīnās prīmī gradūs et structūram optīmizātam combinat, altiōrem rātum penetrātiōnis atque longiōrem vītam ūsus in durīs, compactīs et abrāsīvīs formatiōnibus petrōsum adipiscitur. Frequēntiam substitūtiōnis ferrōrum minuit, pretium operis dēmittit et efficāciam prōiectī generālem augēt, ita ut optiō praeferrēnda sit inter contrāctōrēs perforātiōnis perītōs per orbem terrārum.
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