GOST 18931-1973 Full form screw ring-gauges for pipe cylindrical threads from 4 up to 6 nominal diameter Construction and basic sizes《直径 4 ~6 圆柱管螺纹用带全牙型的螺纹环规 结构及基本尺寸》.pdf

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GOST 18931-1973 Full form screw ring-gauges for pipe cylindrical threads from 4  up to 6  nominal diameter Construction and basic sizes《直径 4 ~6 圆柱管螺纹用带全牙型的螺纹环规 结构及基本尺寸》.pdf_第1页
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GOST 18931-1973 Full form screw ring-gauges for pipe cylindrical threads from 4  up to 6  nominal diameter Construction and basic sizes《直径 4 ~6 圆柱管螺纹用带全牙型的螺纹环规 结构及基本尺寸》.pdf_第2页
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GOST 18931-1973 Full form screw ring-gauges for pipe cylindrical threads from 4  up to 6  nominal diameter Construction and basic sizes《直径 4 ~6 圆柱管螺纹用带全牙型的螺纹环规 结构及基本尺寸》.pdf_第3页
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GOST 18931-1973 Full form screw ring-gauges for pipe cylindrical threads from 4  up to 6  nominal diameter Construction and basic sizes《直径 4 ~6 圆柱管螺纹用带全牙型的螺纹环规 结构及基本尺寸》.pdf_第4页
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GOST 18931-1973 Full form screw ring-gauges for pipe cylindrical threads from 4  up to 6  nominal diameter Construction and basic sizes《直径 4 ~6 圆柱管螺纹用带全牙型的螺纹环规 结构及基本尺寸》.pdf_第5页
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