短語詞組短語propagation delay path 傳送延時通道propagation E path 傳播途徑bevel propagation path 斜程測量light t propagation path 光傳播通路beam propagation path 光束傳播軌跡Origin And Propagation Path 源和傳播途徑Crack propagation path 裂紋擴展路徑light propagation path 光傳播通路seismic propagation path 地震波傳播路徑 返回 propagation path