单词	单向流--直流
释义	单向流；直流uniflow
随便看	photographic-plate technique photographic-plate--technique photographic positive photographic print photographic printing photographic printing frame photographic process photographic processing photographic projection photographic radiant photographic reading photographic reconnaissance by satellite photographic record photographic recorder photographic recording photographic--recording photographic recording polarograph photographic reducer photographic reduction photographic refractor photographic reproduction photographic resolution photographic scale photographic screen photographic sensitivity