:沁拠姿嗪屬溺9翎2!嫩玦嫁确皤C0M1DN15,也就是1/2寸,俗称4分管,外径是21.3mm。De20DN20,也就是3/4寸,俗称6分管,外径是26.8mm。De25TOC\o"1-5"\h\zDN25,也就是1寸,夕卜径是33.5mm。De32DN32,也就是1寸2分管,夕卜径是42.25mm。De40DN40,也就是1寸5分管1-1/2,外径是48mm。De50DN50,也就是2寸,夕卜径是63mm。De63DN65,也就是2.5寸,夕卜径是75.5mm。De75DN80,也就是3寸,夕卜径是88.5mm。De90DN100,也就是4寸,夕卜径是114mm。De110各种管材公称直径与外径对照
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关于同志近三年现实表现材料材料类招标技术评分表图表与交易pdf视力表打印pdf用图表说话 pdf
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