Terms containing non-return-to-zero modulation

Subject	English	Chinese
telecom.	non-return-to-zero change to ones modulation	逢 1 变化调制不归零制
telecom.	non-return-to-zero change modulation	异码变化调制不归零制
el.	pulse code modulation/non-return-to-zero	脉码调制/不归零信号变换