公共安全无线电频率 public safety radio frequency
货船安全无线电话证书 cargo ship safety radiotelephony certificate
货船安全无线电报证书 cargo ship safety radiotelegraphy certificate
货船安全无线电证书 cargo ship safety radio certificate ; cargo shisafety radio certificate
安全无线电报 safety radio telegraphy
安全无线电证书 safety radio certificate
公共安全无线电服务 [通信] public safety radio service
转盘安全电磁线圈 swing relief solenoid
南非是世界上秃鹫保护方面的领先者之一，而且也因其对鸟类安全的电线而闻名于世。
South Africa is one of the world leaders in vulture conservation, and is also globally renowned for the birdfriendly electricity powerlines.
在家里时我们应该尤其注意电线，要确保它们的安全性。
At homes we must pay special attention to electric wires and make sure that they are safe.
检查一下，看看电线是否安全，并确保孩子们够不着它们。
Make sure that electric wires are safe and tat children can 't reach them.
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