Document Type and Number:
Japanese Patent JPS5750210
Kind Code:
B2
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Application Number:
JP11030675A
Publication Date:
October 26, 1982
Filing Date:
September 11, 1975
Export Citation:
International Classes:
E01F8/00; E01B19/00; E01C1/00; E04B1/82; G10K11/02; G10K11/172