(1) Polygon SUVNPQ is equilateral and equiangular and TWOR is a rectangle.

(2) At first, some properties and judging methods of equiangular tight frame are given.

(3) A new algorithm for tracing equiangular curves is presented to improve the machining quality of free-form surfaces.

(4) Secondly, some results of real equiangular tight frame are extended to complex equiangular tight frame.

(5) You see, with the square as the center, eight equiangular thoroughfares extend toward eight different directions.

(6) Chapter 1 summarizes the emergence and development of frame and equiangular tight frame, and sketches the main work and the structure of the thesis.

(7) The author introduces the principle and properties of FI two-arms equiangular spiral antenna and Lp(logarithmically periodic)antenna.

(8) Two novel spherical helical antennas are designed by projecting the planar equiangular spiral antenna onto the surfaces of hemisphere and partial sphere.

(9) This paper simplifies the gear change calculation and machine adjustment in machining equiangular helix conical milling cutter with non-circular gear method.

(10) If you test by the triangle's angles, possible types are right, acute, obtuse( ), or equiangular.

(11) Microwave absorbing properties of the composites containing the planar equiangular spiral antenna arrays were investigated.

(12) To complete the surface tests of 3D profile with CMM, based on tip compensation, the equiangular graduated measurement and equidistance graduated measurement are suggested.