【计】 不归零制

nonreturn-to-zreo mark

nonreturn-to-zreo inverse

nonreturn-to-zero change on one\nNRZ1\n计

nonreturn valve

nonreturn-to-reference recording【计】;nonreturn-to-zero recording【计】

nonreturn-to-zero mark recording【计】

nonreturn-to-zero【计】

nonreturn-to-zero level【计】