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  • QJ6998032821
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  • 焊接,工程师,检查,材质,样品,显微镜,测试,实验室,测验,杜塞尔多夫,北莱茵-威斯特伐利亚,德国,欧洲
  • welding engineer examining material sample with the microscope,metallography,material testing lab of the chamber of crafts,test lab of the welding institute,dusseldorf,north rhine-westphalia,germany,europe

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