Kabushiki Kaisha Miyangaga
Kabushiki Kaisha Miyangaga Patent applications | ||
Patent application number | Title | Published |
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20130266386 | DRILL BIT - An object is to provide a drill bit with improved strength of joint between a bit tip and a bit shaft without diminishing dust suction performance of the drill bit. A drill bit 1 includes: a bit tip | 10-10-2013 |