ASTM WK39147(What is a Work Item? / How to Input to a Work Item)Work Item: ASTM WK39147 - Revision of D7520 - 09 Standard Test Method for Determining the Opacity of a Plume in the Outdoor Ambient AtmosphereActive Standard: D7520 - 09 Developed by Subcommittee: D22.03 | Committee D22 Home | Contact Staff Manager
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