JPH0434470Y2 - - Google Patents

Info

Publication number
JPH0434470Y2
JPH0434470Y2 JP1987129288U JP12928887U JPH0434470Y2 JP H0434470 Y2 JPH0434470 Y2 JP H0434470Y2 JP 1987129288 U JP1987129288 U JP 1987129288U JP 12928887 U JP12928887 U JP 12928887U JP H0434470 Y2 JPH0434470 Y2 JP H0434470Y2
Authority
JP
Japan
Prior art keywords
annular antenna
drill
discriminator
signal
detection sensor
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
JP1987129288U
Other languages
English (en)
Japanese (ja)
Other versions
JPS6434584U (en]
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 JP1987129288U priority Critical patent/JPH0434470Y2/ja
Publication of JPS6434584U publication Critical patent/JPS6434584U/ja
Application granted granted Critical
Publication of JPH0434470Y2 publication Critical patent/JPH0434470Y2/ja
Expired legal-status Critical Current

Links

JP1987129288U 1987-08-26 1987-08-26 Expired JPH0434470Y2 (en])

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1987129288U JPH0434470Y2 (en]) 1987-08-26 1987-08-26

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1987129288U JPH0434470Y2 (en]) 1987-08-26 1987-08-26

Publications (2)

Publication Number Publication Date
JPS6434584U JPS6434584U (en]) 1989-03-02
JPH0434470Y2 true JPH0434470Y2 (en]) 1992-08-17

Family

ID=31383428

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1987129288U Expired JPH0434470Y2 (en]) 1987-08-26 1987-08-26

Country Status (1)

Country Link
JP (1) JPH0434470Y2 (en])

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6397151B1 (ja) * 2018-04-26 2018-09-26 健之 藤井 地盤調査方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53148101A (en) * 1977-05-31 1978-12-23 Nissho Kogyo Kk Detecting device for berried metals in case of utilizing boring machine and antena for detection

Also Published As

Publication number Publication date
JPS6434584U (en]) 1989-03-02

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