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What tool is convenient for making a φ500mm circular hole in a reinforced concrete floor?

2017-10-07View Original

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What tool is convenient for making a φ500mm circular hole in a reinforced concrete floor?
Reply #22017-10-07
For decorative rhinestones, 500 per circle is sufficient
Reply #32017-10-08
Is it like this? Drill holes around it first, then remove the center part? This is too troublesome. Is there any tool that can cut directly along the 500-degree circle?

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