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贴片直插MC74VHC393MEL，MC74VHC374ML2，MC74VHC393DTG，4
贴片直插MC74VHC393ML2，MC74VHC374MEL，MC74VHC393DR2，4
贴片直插MC74VHC374ML1，MC74VHC373ML2，MC74VHC374DWG，4
