transfer-prohibited signal

例句：

1. 1. The engineer was instructed to transfer the prohibited signal immediately.
   工程师被指示立即转移禁止信号。
2. 2. The company has been warned about the transfer prohibited signal.
   公司已被警告关于转移禁止信号。
3. 3. The new policy requires that all transfer prohibited signals be clearly marked.
   新政策要求所有转移禁止信号都应清晰标记。