JUS C B5 309-1990 Plpetrork Single averlap flexible metal boses (unpacksd so tightttess rrlth cir-cnlar or polygonal secticm in protected carbon steel)《管道工程 单重叠柔性金属管(不加填料、高紧度、圆形或多边.pdf

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JUS C B5 309-1990 Plpetrork Single averlap flexible metal boses (unpacksd so tightttess rrlth cir-cnlar or polygonal secticm in protected carbon steel)《管道工程 单重叠柔性金属管(不加填料、高紧度、圆形或多边.pdf_第1页
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JUS C B5 309-1990 Plpetrork Single averlap flexible metal boses (unpacksd so tightttess rrlth cir-cnlar or polygonal secticm in protected carbon steel)《管道工程 单重叠柔性金属管(不加填料、高紧度、圆形或多边.pdf_第2页
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