| 摘要 |
In order to prevent the mismating of several daughterboards ( 2 ) that are combined into a plug-in unit ( 20 ) with corresponding board connectors ( 3 ) on a motherboard ( 1 ), it is proposed that the mating of the plug-in unit ( 20 ) is effectively prevented by means of a blocking block ( 10 ) that is inserted into an intermediate space between two board connectors ( 3 ) that are spaced apart from one another by a regular connector spacing and snapped into window-like recesses ( 4 ) of the board connectors ( 3 ).
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