1、The origin in a polar coordinate system; the vertex of a polar angle.
極點(diǎn)一個(gè)極坐標(biāo)系中的始端；一個(gè)極角的頂點(diǎn)

2、The mesh equations of gears are given by tangent polar coordinate system.
本文給出了切線(xiàn)極坐標(biāo)下的齒輪嚙合方程式。

3、The origin in a polar coordinate system; the vertex of a polar angle
極點(diǎn)一個(gè)極坐標(biāo)系中的始端；一個(gè)極角的頂點(diǎn)

4、Polar Coordinate Form of Biot-Savart Law in Magnetic Anisotropic Medium
各向異性磁介質(zhì)畢奧－薩伐爾定律極坐標(biāo)形式