单词	五边形支撑
释义	五边形支撑 pentagonaltimbering
随便看	telegraph set telegraph shaping network telegraph ship telegraph signal telegraph signal distortion telegraph signal element telegraph signal generator telegraph signal pattern telegraph slip telegraph sounder telegraph sounder key telegraph speed telegraph stamp telegraph station telegraph statistics telegraph subscriber telegraph superposed circuit telegraph supervisory set telegraph switchboard telegraph switching telegraph switching board telegraph switching center telegraph switching equipment telegraph switching exchange telegraph switching relay system