求救
ask for help
求救呼号
distress call
启动拨号信号
starting dialing signal
启动信号
activating signal; actuating signal; enable signal; starting signal
起动信号
start signal
起停信号
start-stop signal
起停信号畸变
start-stop signal distortion
前置信号处理系统
adminidtrative signal-processing system
强信号检波
power detection
切断信号
blanking signal
切断信号支路操作法
cut-signal-branch operation
清除信号
reset signal
请求信号
request send
驱动信号
driving signal
取消信号
cancelling signal
全零字符信号
all-zero character signal
批准请求
ratify a motion
迫切需求
active demand
祈求
conjure; imprecate; imprecation; invoke; pray for
supplicant; supplication
祈求的
invocatory