u boat
u boat-
The U boat campaign makes it necessary to restrict severely the reading of signals by unauthorised persons .
因潜艇战役，必须严禁未经许可的人员读取通信信号。
-
Laser Communication to U - boat Study on Hydrofoil Maneuvering
激光对潜通信的作用及前景水翼船机动操作特征探讨
-
Once again I forbid all authorities who have not express orders from the operations division or the Admiral commanding U boats to tune in on the operational U boat wave .
我再次重申，所有未接到行动部门或海军潜艇指挥部的命令者，严禁接收潜艇行动频道。