【电】 梯形波

关于φ=π/ [n/]< 时梯形波图G_n上的Steiner最小树

acme screw thread【机】;trapezoidal thread【机】

trapezoidal thread broaching tap

sheet with trapezoidal corrugations

trapezoidal

trapezoidal pulse【电子】

keystone【电子】;keystone distortion【电子】;trapezoidal distortion【电子】

trapezoidal filter

trapezoidal index profile dispersion-shifted single-mode fiber