
Draft Bs 4660 - Unplasticized Poly(vinyl Chloride) (pvc-u) Plastics Fittings Of Nominal Sizes 110 And 160 For Below Ground Gravity Drainage And Sewerage (excluding Bends, Branches And Couplers)
出版:British Standards Institution

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Draft Bs 4660 - Unplasticized Poly(vinyl Chloride) (pvc-u) Plastics Fittings Of Nominal Sizes 110 And 160 For Below Ground Gravity Drainage And Sewerage (excluding Bends, Branches And Couplers)
出版:British Standards Institution
专家解读视频