parallels of a surface of revolution

section a-a a-a

metric of a space

component of a tensor

order of a tensor

application of a surface

area of a surface

binode of a surface

Drawing of surface of action

element of a surface

evolute of a surface

fluted helix surface of a horizontal tube

fluted surface of a horizontal tube

focal surface of a congruence

generator of a surface

genus of a surface

geodesic circle [of a surface]

illuminating surface of a reflex reflextor

illuminating surface of a signalling device