
Amendment To Bs 4660:1989 Unplasticized Polyvinyl Chloride (pvc-u) Pipes & Plastics Fittings Of Nominal Sizes 110 &116 For Below Ground Gravity Drainage & Sewerage
出版:British Standards Institution

专家解读视频
Amendment To Bs 4660:1989 Unplasticized Polyvinyl Chloride (pvc-u) Pipes & Plastics Fittings Of Nominal Sizes 110 &116 For Below Ground Gravity Drainage & Sewerage
出版:British Standards Institution
专家解读视频