
Amendment No.2 To Bs 5423:1987 Specification For Portable Fire Extinguishers (as Amended By Amd 5989, May 1989)
出版:British Standards Institution

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Amendment No.2 To Bs 5423:1987 Specification For Portable Fire Extinguishers (as Amended By Amd 5989, May 1989)
出版:British Standards Institution
专家解读视频