JPS63879Y2 - - Google Patents

Info

Publication number
JPS63879Y2
JPS63879Y2 JP1980031262U JP3126280U JPS63879Y2 JP S63879 Y2 JPS63879 Y2 JP S63879Y2 JP 1980031262 U JP1980031262 U JP 1980031262U JP 3126280 U JP3126280 U JP 3126280U JP S63879 Y2 JPS63879 Y2 JP S63879Y2
Authority
JP
Japan
Prior art keywords
lock
locks
material lock
tunnel
entrance
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
JP1980031262U
Other languages
English (en)
Japanese (ja)
Other versions
JPS56134999U (https=
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 JP1980031262U priority Critical patent/JPS63879Y2/ja
Publication of JPS56134999U publication Critical patent/JPS56134999U/ja
Application granted granted Critical
Publication of JPS63879Y2 publication Critical patent/JPS63879Y2/ja
Expired legal-status Critical Current

Links

Landscapes

  • Excavating Of Shafts Or Tunnels (AREA)
JP1980031262U 1980-03-11 1980-03-11 Expired JPS63879Y2 (https=)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1980031262U JPS63879Y2 (https=) 1980-03-11 1980-03-11

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1980031262U JPS63879Y2 (https=) 1980-03-11 1980-03-11

Publications (2)

Publication Number Publication Date
JPS56134999U JPS56134999U (https=) 1981-10-13
JPS63879Y2 true JPS63879Y2 (https=) 1988-01-11

Family

ID=29627127

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1980031262U Expired JPS63879Y2 (https=) 1980-03-11 1980-03-11

Country Status (1)

Country Link
JP (1) JPS63879Y2 (https=)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS531564B2 (https=) * 1972-10-02 1978-01-20

Also Published As

Publication number Publication date
JPS56134999U (https=) 1981-10-13

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