internal self-defocusing
内自散焦

• sampler
• sample size
• sample variance
• sampling camera
• sampling control
• sampling function
• sampling inspection
• sampling lattice
• sampling oscilloscope
• sampling system
• sampling theorem
• sampling time
• sandblast
• sand erosion effect
• sand glass
• sand hole
• sanding
• sandwich dimmer
• sandwich film
• sandwich hologram
• sandwich hologram interferometry
• sandwich ribbon fibre
• sapphire
• satellite
• satellite-borne laser system