cathodochromic storage tube
阴极射线色存储管

• ruthenium
• rutile
• rutile prism
• Rybderg state
• rydberg
• Rydberg constant
• Rydberg series
• Sabattier effect
• saddle
• saddle-field lens
• saddle point
• safe illumination
• safelight
• safelight filter
• safe operation
• safety apparatus
• safety clutch
• safety coefficient
• safety factor
• safety film
• safety glass
• safety goggles
• safety lamp
• safety lighting
• safety pin