light-sensitive relay tube
光敏继电管

• extinction test
• extinction voltage
• extinquishing filter
• extra-axial imagery
• extra-axial object point
• extra-axial point
• extra band
• extra central telescope
• extraction
• extraction ability
• extra=dense barium crown
• extra dense flient
• extra excitation
• extra-fine fit
• extra-fine thread
• extrafocal image
• extrafocal photometry
• extragalactic object
• extra-light flint
• extramural absorption
• extramural cladding
• extrancous wave
• Extraocular orbital implant
• extraordinary index of refraction
• extraordinary light