Centering rotary power drilling tool for removing welding spots and welding spot removing method
The invention relates to a centering rotary power drilling tool for removing welding spots and a welding spot removing method, and belongs to the technical field of handheld trepanning drilling tools. Comprising a drilling tool body which comprises a shell and a driving motor which is located in the...
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Format: | Patent |
Sprache: | chi ; eng |
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