Title:
APPARATUS FOR HOLDING AND CONTROLLING WATER PRESSURE OF MUDDY WATER AND MUDDY SLURRY SHIELD STALL
Document Type and Number:
Japanese Patent JPS5833693
Kind Code:
A
Inventors:
YOSHIOKA YUKINORI
HIRATA KENJI
HIRATA KENJI
Application Number:
JP12944181A
Publication Date:
February 26, 1983
Filing Date:
August 20, 1981
Export Citation:
Assignee:
PACIFIC METALS CO LTD
International Classes:
E21D9/13; E21D9/06; (IPC1-7): E21D9/06
Attorney, Agent or Firm:
Ezaki Mitsuyoshi