“welding qualification and certification”的概念、定义、翻译、参考文献-科学参考

单词	welding qualification and certification
释义	welding qualification and certification Encyclopedia 工学金属焊接释 welding qualification and certification焊接资格认证按照从事焊接行业所必需的技能标准或任职资格条件，通过政府或国际认可的考核机构对劳动者的技能水平进行评价和鉴定，并对合格者授予焊接技术资格证书的活动。
随便看	Le Verrier Leverrier ring lever rule lever scale lever stop lever-type steam distributing gear Levi Leviathan Levi Ben Gershom Levi Ben Gerson Levi Civita Levi-Civita Levi Civita connection Levi-Civita connection Levi-Civita crater Levi-Civita density Levi-Civita parallel displacement Levi-Civita parallelism Levi-Civita pseudotensor Levi-Civita regularization Levi-Civita symbol Levi Civita tensor Levi-Civita tensor Levi condition Levi decomposition

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