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采用金剛石涂層，配合先進工藝獲得更佳的涂層附著性. 先進的研磨工藝確保在超長有效徑內，保證超高同軸度， 耐高溫、耐磨損. Using diamond coating, with advanced technology to obtain better coating adhesion; Advanced grinding technology to ensure that the ultra-long effective diameter, to ensure ultra-high coaxiality, high temperature resistance, wear resistance...