FH
abbr. 消防栓（Fire Hydrant）；给水加热器（Feedwater Heater）
例句
The principle of FH communication is described.
简述了跳频通信的基本原理。
Differential frequency hopping (DFH) is a kind of new frequency hopping (FH) technique.
差分跳频是一种新型的跳频通信技术。
The end of the list is indicated by a feed document that does not contain an fh: prev element.
列表的末尾由一个不包含fh： prev元素的feed文档来指示。
