Title:
【発明の名称】穿孔装置
Document Type and Number:
Japanese Patent JPH0799077
Kind Code:
B2
Inventors:
Nishioka Satoshi
Takasu Conquest
Hiroi Keiji
Koji Chung
Takasu Conquest
Hiroi Keiji
Koji Chung
Application Number:
JP21788387A
Publication Date:
October 25, 1995
Filing Date:
September 02, 1987
Export Citation:
Assignee:
Tokyu Construction Co., Ltd.
International Classes:
E21B7/20; E21B1/00; (IPC1-7): E21C3/00
Domestic Patent References:
| JP51128803A | ||||
| JP61116889U | ||||
| JP505845Y1 |
Attorney, Agent or Firm:
Suzuki Seishiro
Next Patent: シールド工法における裏込め注入装置