JPH01156294U - - Google Patents

Info

Publication number
JPH01156294U
JPH01156294U JP5273188U JP5273188U JPH01156294U JP H01156294 U JPH01156294 U JP H01156294U JP 5273188 U JP5273188 U JP 5273188U JP 5273188 U JP5273188 U JP 5273188U JP H01156294 U JPH01156294 U JP H01156294U
Authority
JP
Japan
Prior art keywords
air
cover
drill bit
suction fan
bottom wall
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
JP5273188U
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 JP5273188U priority Critical patent/JPH01156294U/ja
Publication of JPH01156294U publication Critical patent/JPH01156294U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Earth Drilling (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
JP5273188U 1988-04-21 1988-04-21 Pending JPH01156294U (US06566495-20030520-M00011.png)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5273188U JPH01156294U (US06566495-20030520-M00011.png) 1988-04-21 1988-04-21

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5273188U JPH01156294U (US06566495-20030520-M00011.png) 1988-04-21 1988-04-21

Publications (1)

Publication Number Publication Date
JPH01156294U true JPH01156294U (US06566495-20030520-M00011.png) 1989-10-26

Family

ID=31278733

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5273188U Pending JPH01156294U (US06566495-20030520-M00011.png) 1988-04-21 1988-04-21

Country Status (1)

Country Link
JP (1) JPH01156294U (US06566495-20030520-M00011.png)

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