certificate of competency
短语词组
- foreign certificate of competency 外籍适任证书
- COC certificate of competency 船员
- area a certificate of competency 类适任证书;A类适任证书
- river trade certificate of competency 内河航行合格证书
- certificate of competency as master 翻译;船长合格执照英语 返回 certificate of competency