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Title:
【発明の名称】岩盤掘削穿孔方法及び装置
Document Type and Number:
Japanese Patent JPS5930879
Kind Code:
B2
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Inventors:
ONO JUJI
KUSADA TAKAHITO
Application Number:
JP12731779A
Publication Date:
July 30, 1984
Filing Date:
October 04, 1979
Export Citation:
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Assignee:
SHIMIZU CONSTRUCTION CO LTD
International Classes:
E21B10/36; E21B1/00; E21B17/10; E21C37/26; E21D9/00; F42D3/04; (IPC1-7): E21C37/12; E21B10/00; E21D9/00
Attorney, Agent or Firm:
Tomita Koharu



 
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