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简图用图形符号.第7部分;基本机械构件
Graphical symbols for diagrams.part 7：Basic mechanical components
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石油化工采暖通风与空气调节设计图例及代号
Design symbols and alphabet code for heating, ventilation and air conditioning in petrochemical industry
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石油化工流程图图例
PFD/P&ID legends in petrochemical industry
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石油化工仪表管线平面布置图图形符号及文字代号
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石油化工配管工程常用缩写词
Abbreviation of piping engineering in petrochemical industry
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石油化工配管工程设计图例
Legend of piping engineering in petrochemical industry
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石油化工配管工程术语
Terms of piping engineering in petrochemical industry
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