(a device producing) a magnetic field capable of focusing a beam of charged particles.
| 单词 | θ78156 | 
| 释义 | the world > matter > physics > electromagnetic radiation > magnetism > 			[noun]		 > magnetic field > type of field > device producing (1)		 magnetic lens1919 (a device producing) a magnetic field capable of focusing a beam of charged particles. | 
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