distress telephone calls

marine calling and distress radio telephony frequency

海上呼叫和遇险无线电话频率

distress frequency

无线电频率遇险呼救频率

Distress Radio Call System

遇险无线电呼叫系统

marine frequency

海上无线电通信频率

Digital Selective Calling [Global Maritime Distress and Safety System]

数字选择性呼叫〔全球海上遇险和安全系统〕

international distress radio frequency

国际呼救无线电频率

A Wireless Markup Language (WML) Based on XML is intended for use in such narrow-band devices as cellular phones and pagers for the transfer and display of text.

无线标记语言WML是基于XML,用于行动电话和呼叫器的窄频设备,传送并显示文字。

I'll use my car radio to call for help.

我现在就用车上无线电呼叫求援。

Global maritime distress and safety system(GMDSS)--Technical requirement for marine telecommunication equipment

GB15304-1994全球海上遇险安全系统(GMDSS)船用无线电通信设备技术要求

An international radiotelephone signal word used by aircraft and ships in distress.

呼救信号遇险的飞机、船只等使用的国际无线电呼救信号

call or clear indicator for telephone switch-boards and exchanges

呼叫或拆线指示器,电话交换台和交换机用的

VHF radio telephone transmitter

甚高频无线电话发话器

Ham radio call sign on-line, indexed by call, name; and address.

无线电爱好者的电台呼叫信号一般是以呼号、姓名和地址来索引的。

To call(a party) on a telephone.

打电话（一方）在电话上拨号呼叫

A rotatable disk on a telephone with numbers and letters, used to signal the number to which a call is made.

拨号盘电话上带有数字和字母的转盘，用来发送号码给呼叫的电话

HF single side-band radio telephone

高频单边带无线电话

very high frequency radio-telephone communicatio

甚高频无线电话通信

very high frequency radio-telephone channel

甚高频无线电话波道