homocentric rays

axial rays

gamma rays γ-rays

Axial-threshing with axial feeding

ratio of axial compressive force to axial compress

Roentgen rays {= X-rays}

X-rays (Roentgen rays)

β-rays (beta rays)

homocentric

homocentric beam

homocentric circle division

homocentric illumination

homocentric lens

homocentric objective

homocentric pencil

homocentric pencil of rays

homocentric sphere

homocentric two tangential circles

homometric structure