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Document Type and Number:
Japanese Patent JPS566559
Kind Code:
Y2
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Application Number:
JP4406777U
Publication Date:
February 13, 1981
Filing Date:
April 11, 1977
Export Citation:
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International Classes:
E02B9/06; E02D19/00; E04B1/41; E04B1/76; E04B1/78; E21F16/02; (IPC1-7): E21F16/02



 
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