精品文献
新义路159弄
ASTMB159、ASTMB159M-01磷青铜丝技术规范
Designation: B 159/B 159M –01 Standard Speci?cation for Phosphor Bronze Wire 1 This standard is issuedunder the ?xed designation B 159/B 159M; the number immediately following the designation indicates the year of original adoption or, in the caseof revision, the year of last revision. A number in parenthesesindicates the year of last reapproval. A superscript epsilon (e) indicates an editorial ch