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Patent Searching and Data


Document Type and Number:
Japanese Patent JPS5513269
Kind Code:
B2
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JPH05113092PERCUSSION MECHANISM FOR DRILL ROD UNIT
Application Number:
JP4841977A
Publication Date:
April 08, 1980
Filing Date:
April 28, 1977
Export Citation:
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International Classes:
E21B1/02; E21B1/00; E21B21/00



 
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