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Title: Experimental apparatus, experimental compensator. [Go to resource]
Description: Experimental apparatus, experimental compensator. License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Temporal: 1920 Source: Science Museum Identifier: 1921-400 Go to resource More Like this...-
Miscellaneous experimental and lens-grinding…Miscellaneous experimental and lens-grinding apparatus…
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