货船安全无线电证书
cargo ship safety radio certificate
货船安全无线电报证书
cargo ship safety radiotelegraphy certificate
货船安全无线电话证书
cargo ship safety radiotelephony certificate
货船无线电报安全证书
cargo ship safety radiotelegraphy certificate
货船无线电话安全证书
cargo ship safety radiotelephony certificate
无线电报设备安全证书
Safety radio-telegraphy certificate
无线电台安全证书
safety of radio certificate
美国电视与无线电无线电工作女性协会
American women in radio and television
公共安全无线电频率
public safety radio frequency
国际无线电证书
international wireless certificate
超越地平线无线电通讯
radio communication beyond the horizon
船岸无线电电传打字机
ship-shore radio teletypewriter
海岸无线电电传打字机
shore radio teletypewriter