短語詞組短語helical delay line 螺旋延遲線helical Blumlein line 螺旋Blumlein線helical linearity transmission line 螺旋形帶狀傳輸線conic logarithmic helical line 圓錐對(duì)數(shù)螺線helical line phase shifter 螺旋線移相器helical line error 螺旋線誤差ekman helical line ekman 螺線helical line type filter 螺旋線形濾波器 返回 helical line