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Subject 23 - Electric Insulating and Insulators

EXAMPLE
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023008

023 is subject 23 Electric Insulators and Insulating
008 is the 8th image in that particular subject catagory

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023001
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023002
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023003
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023004
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023005
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023006
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023007
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023008
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023009
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023011
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023012
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023013
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023014
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023015
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023017
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023018
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023019
other insulators elsewhere in this collection - not all are represented at this time
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