A switch unit 1 wherein said switch module has a plurality of contact pairs and a corresponding plurality of rockers for actuating electrical circuit between said contact pairs, said cover having a plurality of rocker actuating elements in a coded arrangement corresponding to {HEAD ~ a specific identification} for {TAIL ~ said switch module} 
for
A switch unit 1 wherein said switch module has a plurality of contact pairs and a corresponding plurality of rockers for actuating electrical circuit between said contact pairs , said cover having a plurality of rocker actuating elements in a coded arrangement corresponding to { HEAD ~ a specific identification } for { TAIL ~ said switch module }
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