telephotography
(1)传真电报术
(2)远距照相术

• speed-change mechanism
• speed counter
• speed gear
• speed lens
• speed limiting device
• speed of light
• speed of registration
• speedometer
• speed panchro lens
• speed reducer
• sphere
• spheremeters
• sphere of reflection
• spherical
• spherical aberration
• spherical adapter
• spherical angle
• spherical bearing
• spherical cavity
• spherical chain
• spherical concave and convex mirrors
• spherical coordinates
• spherical generator
• spherical harmonics
• spherical lamellar grating interferometer