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Head:The boring shaft is made of SACMA-645, which is imported from Germany. After nitrogen treatment, thehardness is as high as (HS 100°+ 10°), and after ultra deep cooling (- 190 °C) aging treatment, the expansionwear resistance is improved; the main shaft can be extended to 500/700mm long, suitable for deep holeprocessing; Column:The high strength arch bridge type auxiliary structure is adopted in the high-quality Meehanite cast iron body,which can improve the rigidity of the column by 27%. Tw
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