air-filled thermocouple
充气温差电偶

• neutron scintillator
• neutron spectrometer
• news photography
• newsreel photography
• newton
• Newtonian-Cassegrain telecscope
• Newtonian colour scale
• Newtonian focus
• Newtonian formula
• Newtonian telescope
• Newtonian time
• Newton's disk
• Newton's fringes
• Newton's ring
• nexus
• n-fold axis
• n-fold axisof symmetry
• n-fold screw axis
• n-fold symmetry axis
• nichrome
• nichrome film
• nick
• nickel
• nickel bronze
• nickel-cadmium battery