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大管轮
 大管轮
nautic. tech. second engineer officer
shipb. first engineer
| 证书
 X.509 证书
IT X.509 certificate
 证书
gen. credential
corp.gov. credentials
interntl.trade. voucher; attested document; certificate of appointment
met. letter

to phrases
大管轮
nautic., tech. second engineer officer
shipb. first engineer
大管轮【船】
tech. first engineer
大管轮
: 7 phrases in 3 subjects
Oil / petroleum1
Shipbuilding4
Technology2