Document Type and Number:
Japanese Patent JPS5220401
Kind Code:
Y2
Application Number:
JP6106874U
Publication Date:
May 11, 1977
Filing Date:
May 27, 1974
Export Citation:
International Classes:
B65G65/22; E02F3/06; E21B12/06; (IPC1-7): E02D17/144; B65G65/22