·2,447,543篇论文数据，部分数据来源于NoteExpress
Includes the training certificate of crew membership, the service book of crew members, the competence certificate of the crew membership, and other competence certificates.
包括船员培训合格证、船员服务簿、船员适任证书及其他适任证件。
youdao
应用推荐
模块上移
模块下移
不移动