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roof of suitability;Qualifications;Quality assurance;Railway applications;Railway vehicle components;Railway vehicle construction;Railway vehicles;Railways;Repair;Specification (approval);Suitability;Welding;Welding engineering;Welding processes;Welding shops;Welding supervisors;Welding work【摘要】: 【中国标准分类号】: S30【国际标准分类号】: 25_160_01;45_060_01【页数】: 24P.;A4【正文语种】: 英语 | 欢迎光临 世界资料网论坛 (http://bbs.infoeach.com/) | Powered by Discuz! X2.5 |