单词	ray axial angle
释义	ray axial angle 光线轴角
随便看	source of economic growth source of educational financing source of educational fund source of electricity source of electricity supply source of electric supply source of electromagnetic interference source of electron gun grid bias source of emission source of enchantment source of endless troubles source of energy source of energy, particular source of error source of error in survey source of errors source of expenses source of exposure source of failure source of feed source of feeling of free will Source of Fen River source of field source of finance source of fire