B61L 1/025
Electric devices associated with track {, e.g. rail contacts actuated by variation of resistance or by piezo-electricity}
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Edits on 9 Mar, 2022
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Infobox (+4 properties)
Description (+121 characters)
B61L 1/025
Electric devices associated with track {, e.g. rail contacts actuated by variation of resistance or by piezo-electricity}
Infobox
Classification Type
Parent classification
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