"Shell Drills " CNS Standards List| Standard classification | Methods elevated | Method test | Conversion tables | High Strength | Cold formed | Method Test | Biological evaluation | |
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CNS 225
2017 Edition Shell Drills (Shell Counterborer) of High Speed Steel 殼形擴孔鑽 |
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CNS 225
1980 Edition Shell Drills (Shell Counterborer) of High Speed Steel 殼形擴孔鑽 |
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