American National Standard - NOAO

ANSI Y32.2-1975 CSA Z99·1975 IEEE Std 315-1975 Revision of ANSI Y32.2-1972 CSA Z99-1972 IEEE Std 315-1971 IEEE Standards Coordinating Committee 11, Graphic Symbols Secretariat for American National Standards Committee Y32 American Society of Mechanical Engineers Institute of Electrical and Electronics Engineers Approved October 31,1975 ................
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