Int. 80 diamond 90 approach

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IHCR  Boring Toolholders Used on the MB Modular Boring System		IHRF  80° Rhombic Insert Holders Used for Mounting on the MB Fine Boring Heads		IHRF-C  Boring Tools Used for Twin Cutters, Inner to the Opposite - Finishing Tools on MB BHC Combi Boring Heads
IHSR  Rough Boring Tools Used for Twin Cutters, with Their Radial and Axial Edge Inner to the Opposite - Finishing Tool		IHSR-C  Finish Boring Toolholders Used on the BHC MB Modular Boring System