JPH0220178U - - Google Patents

Info

Publication number
JPH0220178U
JPH0220178U JP3361488U JP3361488U JPH0220178U JP H0220178 U JPH0220178 U JP H0220178U JP 3361488 U JP3361488 U JP 3361488U JP 3361488 U JP3361488 U JP 3361488U JP H0220178 U JPH0220178 U JP H0220178U
Authority
JP
Japan
Prior art keywords
manhole
ultrasonic waves
cover
manhole cover
closing
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
JP3361488U
Other languages
English (en)
Japanese (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 JP3361488U priority Critical patent/JPH0220178U/ja
Publication of JPH0220178U publication Critical patent/JPH0220178U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Laying Of Electric Cables Or Lines Outside (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
JP3361488U 1988-03-14 1988-03-14 Pending JPH0220178U (US20100012521A1-20100121-C00001.png)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3361488U JPH0220178U (US20100012521A1-20100121-C00001.png) 1988-03-14 1988-03-14

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3361488U JPH0220178U (US20100012521A1-20100121-C00001.png) 1988-03-14 1988-03-14

Publications (1)

Publication Number Publication Date
JPH0220178U true JPH0220178U (US20100012521A1-20100121-C00001.png) 1990-02-09

Family

ID=31260305

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3361488U Pending JPH0220178U (US20100012521A1-20100121-C00001.png) 1988-03-14 1988-03-14

Country Status (1)

Country Link
JP (1) JPH0220178U (US20100012521A1-20100121-C00001.png)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2017204122A1 (ja) * 2016-05-23 2018-09-20 株式会社日立システムズ マンホール監視システム及び方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2017204122A1 (ja) * 2016-05-23 2018-09-20 株式会社日立システムズ マンホール監視システム及び方法

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