aw first steel p15unitedsteelpipe.com/2012/pdf/1-balck_steel_pipe/6-en 39... · 2013. 2. 25. · bs...

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Page 1: AW first steel P15unitedsteelpipe.com/2012/PDF/1-balck_steel_pipe/6-EN 39... · 2013. 2. 25. · BS 1139-1990 METAL SCAFFOLDING SPECIFICATION max. mm. 4.80 FOR TUBES FOR USE IN SCAFFOLDING