单词	quantum of open space
释义	quantum of open space 绿化总量
随便看	telegraph switching telegraph switching board telegraph switching center telegraph switching equipment telegraph switching exchange telegraph switching relay system telegraph switching system telegraph sybmol telegraph symbol telegraph system telegraph system analyzer telegraph system anlayzer telegraph tape telegraph tapping key telegraph tariffs telegraph telecommunication telegraph, telegraphy telegraph-telephone channel telegraph-telephone separation filter telegraph telephone signal convertor telegraph terminal telegraph terminal equipment telegraph terminal set telegraph text telegraph tractator station