Title:
【発明の名称】油圧式穿孔機の油圧制御装置
Document Type and Number:
Japanese Patent JPH0631523
Kind Code:
B2
Inventors:
YOSHIOKA JUNJI
Application Number:
JP9491586A
Publication Date:
April 27, 1994
Filing Date:
April 25, 1986
Export Citation:
Assignee:
MAZDA MOTOR
International Classes:
E21B1/26; E21B1/00; (IPC1-7): E21C3/20
Domestic Patent References:
| JP5858390A | ||||
| JP5484801A | ||||
| JP56163192U |
Attorney, Agent or Firm:
Kensuke Isshiki (1 person outside)
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