Title:
PORING SYSTEM
Document Type and Number:
Japanese Patent JPS57180795
Kind Code:
A
Inventors:
TAKEMOTO HAJIME
Application Number:
JP6608081A
Publication Date:
November 06, 1982
Filing Date:
April 29, 1981
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
E21B44/00; (IPC1-7): E21B44/00