JPS6040590U - せん孔装置 - Google Patents

せん孔装置

Info

Publication number
JPS6040590U
JPS6040590U JP13300083U JP13300083U JPS6040590U JP S6040590 U JPS6040590 U JP S6040590U JP 13300083 U JP13300083 U JP 13300083U JP 13300083 U JP13300083 U JP 13300083U JP S6040590 U JPS6040590 U JP S6040590U
Authority
JP
Japan
Prior art keywords
drilling device
locking step
bit
inner bit
diameter
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.)
Granted
Application number
JP13300083U
Other languages
English (en)
Japanese (ja)
Other versions
JPS6346550Y2 (enrdf_load_stackoverflow
Inventor
中野　澄男
進 西田
茂夫 国分
宮崎　克之助
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Taisei Corp
Original Assignee
Taisei Corp
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 by Taisei Corp filed Critical Taisei Corp
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

Links

Landscapes

  • 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 true JPS6040590U (ja) 1985-03-22
JPS6346550Y2 JPS6346550Y2 (enrdf_load_stackoverflow) 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 (enrdf_load_stackoverflow)

Cited By (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

Cited By (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
JPS6346550Y2 (enrdf_load_stackoverflow) 1988-12-02

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