“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	unitarily equivalent operator unitarily equivalent representation unitarily invariant norm unitarily similar matrices unitarity unitarity condition unitarity cut unitarity limit unitarity method unitarizable representation unitary unitary algebra unitary algebra; algebra with identity unitary aliquot sequence unitary amicable pair unitary basis unitary bordism unitary bundle unitary case unitary character unitary cobordism unitary cobordism theory unitary connection unitary dilatation unitary divisor

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