Document Type and Number:
Japanese Patent JPS4425631
Kind Code:
Y1
Application Number:
JP8064265U
Publication Date:
October 28, 1969
Filing Date:
October 05, 1965
Export Citation:
International Classes:
E01D19/06; E01C11/02; E01C11/12; (IPC1-7): E01C11/12; E01D19/06