Department Administrative Order (DAO) 19-16 Series of 2019: The New Technical Regulations Concerning the Mandatory Product Certification of Steel-black and Hot-dipped Zine-coated (Galvanized) Longitudinally Welded Steel Pipes (For Ordinary Uses)

Department Administrative Order (DAO) 19-16 Series of 2019: The New Technical Regulations Concerning the Mandatory Product Certification of Steel-black and Hot-dipped Zine-coated (Galvanized) Longitudinally Welded Steel Pipes (For Ordinary Uses) was issued on 4 May 2022.

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