21 Aug, 2019
By, Wikipedia
File:Charles Townes And First Maser.jpg
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Annotations InfoField | This image is annotated: View the annotations at Commons |
284
568
152
72
978
1027
Ammonia gas nozzle
444
572
175
67
978
1027
Quadrupole filter "state selector" creates population inversion
618
572
122
72
978
1027
Resonant cavity
632
258
41
312
978
1027
Output waveguide
245
755
599
270
978
1027
Diffusion vacuum pumps