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Apply to drill hole in various pipeline installing engineering and fitment engineering, drill and get coreprint used in concrete property experiment.
Model number:SZ-65, SZ-100, ZJ-200.
Maximum diameter of hole:65mm, 110mm, 200mm.
Maximum depth of hole:300mm, 300mm, 550mm.
Hollow bits to match:#20, #30, #46, #71, #91, #107.