ultraviolet bandpass filter
紫外带通滤光片

• nodal plane
• nodal point
• nodal point separation
• nodal slide
• nodal suface
• node
• nodestructive inspection
• nodiioplar
• nodule
• noise
• noise amplifier
• noise audiogram
• noise background
• noise eliminationtechnique
• noise equivalent power
• noise factor
• noise figure
• noise filter
• noise-free amplifier
• noise immunity
• noisekiller
• noiseless imaging system
• noise level
• noise limitation
• noise-limited receiver