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Application filed by 西日本鉄道株式会社, 富士ピー・エス・コンクリート株式会社, トーメン建機株式会社filedCritical西日本鉄道株式会社
Priority to JP1990066594UpriorityCriticalpatent/JP2522553Y2/ja
Publication of JPH0426224UpublicationCriticalpatent/JPH0426224U/ja
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Publication of JP2522553Y2publicationCriticalpatent/JP2522553Y2/ja
Taper barrel, screw fastening structure using taper barrel with female screw, formed drill to machine taper barrel, and hammer for driving taper barrel