“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	left translation of a function left translation of functions left transversal left triple of vectors left truncated and right censored data left-truncated and right-censored data left truncated data left-truncated data left-truncated distribution left truncation and right censoring left-truncation and right-censoring left turn left twisted helix left uniformity left unique relation left unit left-unitary kernel left unit element left unit subsemigroup left unity left universal solution left vector space left ventricle left ventricular ejection fraction leftward acceleration

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