Title:
【発明の名称】シールド埋め戻し装置
Document Type and Number:
Japanese Patent JP2876338
Kind Code:
B2
Inventors:
KAWAHARA KEIICHI
FURUTA TOSHIO
NAKAI SAKAE
FURUTA TOSHIO
NAKAI SAKAE
Application Number:
JP20067990A
Publication Date:
March 31, 1999
Filing Date:
July 27, 1990
Export Citation:
Assignee:
MITSUI KENSETSU KK
International Classes:
E21D9/06; E21F15/00; (IPC1-7): E21D9/06; E21F15/00
Domestic Patent References:
| JP2157400A | ||||
| JP59102084A |
Attorney, Agent or Firm:
Shinji Aida (1 outside)