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Patent Searching and Data


Document Type and Number:
Japanese Patent JPS50111839
Kind Code:
A
Application Number:
JP1780074A
Publication Date:
September 02, 1975
Filing Date:
February 13, 1974
Export Citation:
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International Classes:
E01D19/06; E01C11/02; (IPC1-7): E01C11/02



 
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