Title:
【発明の名称】発破孔のノッチ形成装置及びノッチ形成方法
Document Type and Number:
Japanese Patent JP3012877
Kind Code:
B2
Inventors:
Tsunemi Murayama
Hironobu Hayashi
Mitsuo Sasaki
Tatsuhiro Furunaga
Kenji Yoshikawa
Yoshihiko Endo
Hironobu Hayashi
Mitsuo Sasaki
Tatsuhiro Furunaga
Kenji Yoshikawa
Yoshihiko Endo
Application Number:
JP7776494A
Publication Date:
February 28, 2000
Filing Date:
March 25, 1994
Export Citation:
Assignee:
Nippon Steel Corporation
Okumura Gumi Co., Ltd.
Okumura Gumi Co., Ltd.
International Classes:
E21C37/04; (IPC1-7): E21C37/04
Domestic Patent References:
| JP5838890U | ||||
| JP54102502U |
Attorney, Agent or Firm:
Spring Inoue (1 person outside)