automatic fog signal造句

例句与造句

1. The men assigned maintained and operated the light at the end of the breakwater and an automatic fog signal.
2. Like other lights in Boston Harbor, the automatic fog signal has been replaced by a Mariner Radio Activated Sound Signal ( MRASS ) which can be activated by nearby mariners by tuning their marine VHF radio to channel 83A ( 157.17 5Mhz ) and keying the transmitter five times consecutively.
3. It's difficult to find automatic fog signal in a sentence. 用automatic fog signal造句挺难的