Document Type and Number:
Japanese Patent JPS5315020
Kind Code:
B2
More Like This:
Application Number:
JP1756872A
Publication Date:
May 22, 1978
Filing Date:
February 18, 1972
Export Citation:
International Classes:
B23K20/00; B21J5/08; B21K1/22; B21K25/00
Previous Patent: JPS5315019
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