| 单词 | flash-meter | 
| 释义 | > as lemmasflash-meter   flash-meter  n. a device similar to the shutter of a camera which permits momentary exposure of slides for teaching purposes. ΘΚΠ society > leisure > the arts > visual arts > photography > viewing of photographs > 			[noun]		 > projecting on to screen > projector > parts of tinter1891 projection lens1894 lamp-house1912 slide carrier1953 flash-meter1957 slide changer1959 1957    D. T. Herman  et al.  in  S. Saporta  & J. R. Bastian Psycholinguistics 		(1961)	 538/2  				A Keystone Model 1045 projector equipped with an Ilex flashmeter was used. 1959    J. W. Brown  et al.  A-V Instructional Materials Man.  iv. 157  				Keystone overhead projector setup, with tachistoscope (flash meter) and mask in place, ready to project reading slides. < as lemmas  | 
	
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