duty period 工作周期
flight duty period 组员工时 ; 组员服勤时间 ; 执勤时段
flight duty period detail 执勤时段
period of duty 运行时间
period in duty 职务期间
Enters the duty initial period 入职初期
period of duty abroad 海外任职期间
He found plenty of references to this supposed family duty in documents from the period, but never any details.
他找到了很多来自那个时期的所谓家庭任务的参考资料，但从没有任何细节。
Duty period, highlighting prevention, and strengthen all aspects of troubleshooting, truly, does not produce unsafe.
值班期间，突出预防为主，加强对各个环节的隐患排查，切实做到不安全不生产。
According to the PRC custom regulations, the import duty on service parts should be waived within the warranty period if the equipment was legally imported to China.
根据中国海关的规定，如果设备是合法进口到中国的，在质量保证期内维修零部件应免除进口关税的征收。
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