JPS5286902A - Method of boring hole of different diameters in concrete* rock bed* etc* - Google Patents

Method of boring hole of different diameters in concrete* rock bed* etc*

Info

Publication number
JPS5286902A
JPS5286902A JP388176A JP388176A JPS5286902A JP S5286902 A JPS5286902 A JP S5286902A JP 388176 A JP388176 A JP 388176A JP 388176 A JP388176 A JP 388176A JP S5286902 A JPS5286902 A JP S5286902A
Authority
JP
Japan
Prior art keywords
concrete
different diameters
boring hole
rock bed
rock
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.)
Pending
Application number
JP388176A
Other languages
English (en)
Inventor
Yukio Hirata
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP388176A priority Critical patent/JPS5286902A/ja
Publication of JPS5286902A publication Critical patent/JPS5286902A/ja
Pending legal-status Critical Current

Links

Landscapes

  • Earth Drilling (AREA)
JP388176A 1976-01-16 1976-01-16 Method of boring hole of different diameters in concrete* rock bed* etc* Pending JPS5286902A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP388176A JPS5286902A (en) 1976-01-16 1976-01-16 Method of boring hole of different diameters in concrete* rock bed* etc*

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP388176A JPS5286902A (en) 1976-01-16 1976-01-16 Method of boring hole of different diameters in concrete* rock bed* etc*

Publications (1)

Publication Number Publication Date
JPS5286902A true JPS5286902A (en) 1977-07-20

Family

ID=11569513

Family Applications (1)

Application Number Title Priority Date Filing Date
JP388176A Pending JPS5286902A (en) 1976-01-16 1976-01-16 Method of boring hole of different diameters in concrete* rock bed* etc*

Country Status (1)

Country Link
JP (1) JPS5286902A (ja)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013525647A (ja) * 2010-05-07 2013-06-20 オベリックス ホールディングス ピーティーワイ リミテッド 切下げツール
JP2014213555A (ja) * 2013-04-26 2014-11-17 Ｆｓテクニカル株式会社 拡径用ドリルビット
JP2017087352A (ja) * 2015-11-10 2017-05-25 Ｆｓテクニカル株式会社 拡径用ドリルビット

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5179912A (ja) * 1975-01-09 1976-07-12 Akio Ikuta Ankaauekomyoanaakebitsuto

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5179912A (ja) * 1975-01-09 1976-07-12 Akio Ikuta Ankaauekomyoanaakebitsuto

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013525647A (ja) * 2010-05-07 2013-06-20 オベリックス ホールディングス ピーティーワイ リミテッド 切下げツール
JP2014213555A (ja) * 2013-04-26 2014-11-17 Ｆｓテクニカル株式会社 拡径用ドリルビット
JP2017087352A (ja) * 2015-11-10 2017-05-25 Ｆｓテクニカル株式会社 拡径用ドリルビット

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