liuxilin1215 发表于 2013-11-18 12:25:22

求助：ANSI C136.9-2003(R2009)

ANSI C136.9-2003(R2009) American National Standard For Roadway and Area Lighting Equipment – Socket Support Assemblies for Metal Heads – Mechanical Interchangeability

sigh007 发表于 2013-11-18 12:25:23

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