JPS6346550Y2 - - Google Patents

Info

Publication number
JPS6346550Y2
JPS6346550Y2 JP13300083U JP13300083U JPS6346550Y2 JP S6346550 Y2 JPS6346550 Y2 JP S6346550Y2 JP 13300083 U JP13300083 U JP 13300083U JP 13300083 U JP13300083 U JP 13300083U JP S6346550 Y2 JPS6346550 Y2 JP S6346550Y2
Authority
JP
Japan
Prior art keywords
casing
tip
inner rod
bit
rod
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
JP13300083U
Other languages
English (en)
Japanese (ja)
Other versions
JPS6040590U (ja
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP13300083U priority Critical patent/JPS6040590U/ja
Publication of JPS6040590U publication Critical patent/JPS6040590U/ja
Application granted granted Critical
Publication of JPS6346550Y2 publication Critical patent/JPS6346550Y2/ja
Granted legal-status Critical Current

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  • Earth Drilling (AREA)
JP13300083U 1983-08-30 1983-08-30 せん孔装置 Granted JPS6040590U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13300083U JPS6040590U (ja) 1983-08-30 1983-08-30 せん孔装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13300083U JPS6040590U (ja) 1983-08-30 1983-08-30 せん孔装置

Publications (2)

Publication Number Publication Date
JPS6040590U JPS6040590U (ja) 1985-03-22
JPS6346550Y2 true JPS6346550Y2 (en]) 1988-12-02

Family

ID=30300165

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13300083U Granted JPS6040590U (ja) 1983-08-30 1983-08-30 せん孔装置

Country Status (1)

Country Link
JP (1) JPS6040590U (en])

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01319633A (ja) * 1988-06-21 1989-12-25 Fuji Denshi Kogyo Kk クランクシャフトのピン部の高周波表面焼入法

Also Published As

Publication number Publication date
JPS6040590U (ja) 1985-03-22

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