character laydown system
文字排版系统

• luminous emissivity
• luminous emittance
• luminous energy
• luminous energy density
• luminous exitance
• luminous flame
• luminous flux
• luminous flux density
• luminous intensity
• luminous paint
• luminous power
• luminous radiation
• luminous ray
• luminous reflectance
• luminous-reflection factor
• luminous reflectivity
• luminous sensitivity threshold
• luminous sensitivy
• luminous spot
• luminous-spot voltmeter
• luminous standard lamp
• luminous surface
• luminous surface absorptivity
• luminous transmittance
• Lummer-brodhum cube