Title:
【考案の名称】ドリルによる土中穿孔ビツト
Document Type and Number:
Japanese Patent JPS5998983
Kind Code:
U
Inventors:
Kido Tadashi
Application Number:
JP19166882U
Publication Date:
July 04, 1984
Filing Date:
December 16, 1982
Export Citation:
International Classes:
E21B10/26; E21B7/02; E21B10/28; (IPC1-7): E21B10/28; E21B7/02
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