JPS6211154B2 - - Google Patents

Info

Publication number
JPS6211154B2
JPS6211154B2 JP19799981A JP19799981A JPS6211154B2 JP S6211154 B2 JPS6211154 B2 JP S6211154B2 JP 19799981 A JP19799981 A JP 19799981A JP 19799981 A JP19799981 A JP 19799981A JP S6211154 B2 JPS6211154 B2 JP S6211154B2
Authority
JP
Japan
Prior art keywords
propulsion
chisel
head
tip
propulsion head
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
JP19799981A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5898589A (ja
Inventor
Norio Yamakado
Iwao Nakahara
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.)
Eneos Corp
Original Assignee
Nippon Petrochemicals Co Ltd
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 Nippon Petrochemicals Co Ltd filed Critical Nippon Petrochemicals Co Ltd
Priority to JP19799981A priority Critical patent/JPS5898589A/ja
Publication of JPS5898589A publication Critical patent/JPS5898589A/ja
Publication of JPS6211154B2 publication Critical patent/JPS6211154B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Earth Drilling (AREA)
JP19799981A 1981-12-09 1981-12-09 衝撃式推進装置 Granted JPS5898589A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19799981A JPS5898589A (ja) 1981-12-09 1981-12-09 衝撃式推進装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19799981A JPS5898589A (ja) 1981-12-09 1981-12-09 衝撃式推進装置

Publications (2)

Publication Number Publication Date
JPS5898589A JPS5898589A (ja) 1983-06-11
JPS6211154B2 true JPS6211154B2 (enrdf_load_stackoverflow) 1987-03-11

Family

ID=16383823

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19799981A Granted JPS5898589A (ja) 1981-12-09 1981-12-09 衝撃式推進装置

Country Status (1)

Country Link
JP (1) JPS5898589A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
JPS5898589A (ja) 1983-06-11

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