【电】 signal
【电】 a-n signal a-n; sign; signal
carrier wave
【计】 carrier; carrier wave; wave carrier
【计】 FM
record; mark; register; account; memorize; report; take notes
【计】 design development record; posting; REC; record
【医】 protocol; reading; register; registration
【经】 entry; keeping of record; mark; record; record keeping; records