ultraviolet sensitive paper
紫外光敏纸

• all-purpose instrument
• all-purpose telescope
• all-supersonic
• all-transistor camera
• all-weather
• allyl diglycol carbonate
• alnico
• aloxite
• alpax
• alphabet laser
• alpha-crystal
• alpha meter
• alphanumeric
• Alphanumeric Reader
• alpha ray
• alpha-ray spectrograph
• alpha-ray spectrometer
• alpha-ray spectrum
• alphatron
• alsimag
• alt-alt telescope mounting
• alt-azimuth
• Altazimuth
• alt-azimuth telescope mounting
• alternate-line scanning