常見例句雙語例句Signal demodulation of automatic block with audio frequency shift modulated track circuits was implemented with phase-locked loop( PLL) technique and a singe chip microcomputer.利用鎖相環(huán)（LL）窄帶跟蹤特性，與單片機(jī)結(jié)郃，實(shí)現(xiàn)自動(dòng)閉塞系統(tǒng)移頻信號解調(diào)。 返回 block demodulation