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NBN A 35-103-1972 1875 《管道和连接,水,煤气和下水道的无螺纹钢管的尺寸限制《等温线》类型和首尾相连焊接的限制(ISt)》.pdf
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相关搜索
NBNA3510319721875
管道
连接
煤气
下水道
螺纹
钢管
尺寸
限制
等温线
类型
首尾相连
焊接
IST
PDF
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