Document Type and Number:
Japanese Patent JPS57133612
Kind Code:
U
Application Number:
JP1826681U
Publication Date:
August 20, 1982
Filing Date:
February 13, 1981
Export Citation:
International Classes:
E01H5/02; E01H5/08; E01H5/09; (IPC1-7): E01H5/02; E01H5/08