JPS56115425A - Locking device for manhole - Google Patents

Locking device for manhole

Info

Publication number
JPS56115425A
JPS56115425A JP1877980A JP1877980A JPS56115425A JP S56115425 A JPS56115425 A JP S56115425A JP 1877980 A JP1877980 A JP 1877980A JP 1877980 A JP1877980 A JP 1877980A JP S56115425 A JPS56115425 A JP S56115425A
Authority
JP
Japan
Prior art keywords
key
lock
face
hole
lowered
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
JP1877980A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5747343B2 (en]
Inventor
Koichi Kuratani
Koji Imamura
Garo Iijima
Yasuo Negishi
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.)
Nippon Telegraph and Telephone Corp
Sumitomo Electric Industries Ltd
Original Assignee
Nippon Telegraph and Telephone Corp
Sumitomo Electric Industries 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 Telegraph and Telephone Corp, Sumitomo Electric Industries Ltd filed Critical Nippon Telegraph and Telephone Corp
Priority to JP1877980A priority Critical patent/JPS56115425A/ja
Publication of JPS56115425A publication Critical patent/JPS56115425A/ja
Publication of JPS5747343B2 publication Critical patent/JPS5747343B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
JP1877980A 1980-02-18 1980-02-18 Locking device for manhole Granted JPS56115425A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1877980A JPS56115425A (en) 1980-02-18 1980-02-18 Locking device for manhole

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1877980A JPS56115425A (en) 1980-02-18 1980-02-18 Locking device for manhole

Publications (2)

Publication Number Publication Date
JPS56115425A true JPS56115425A (en) 1981-09-10
JPS5747343B2 JPS5747343B2 (en]) 1982-10-08

Family

ID=11981112

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1877980A Granted JPS56115425A (en) 1980-02-18 1980-02-18 Locking device for manhole

Country Status (1)

Country Link
JP (1) JPS56115425A (en])

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60219043A (ja) * 1984-04-14 1985-11-01 中山　紘一 溶射被膜による断熱材
JPS61146147U (en]) * 1985-03-01 1986-09-09
JPS62149962U (en]) * 1986-03-18 1987-09-22
JP6762604B2 (ja) 2016-06-13 2020-09-30 国立研究開発法人宇宙航空研究開発機構 翼及び航空機
JP7038404B2 (ja) 2017-12-12 2022-03-18 国立研究開発法人宇宙航空研究開発機構 遷音速翼型、翼及び航空機

Also Published As

Publication number Publication date
JPS5747343B2 (en]) 1982-10-08

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